Statutes, codes, and regulations
Ohio Administrative Code
Title 4101:8 - Board of Building Standards: Residential Code of Ohio
Chapter 4101:8-29 - Water Supply and Distribution
Section 4101:8-29-01 - Water supply and distribution

Ohio Admin. Code 4101:8-29-01

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Current through all regulations passed and filed through October 28, 2024
Section 4101:8-29-01 - Water supply and distribution

[Comment: When a reference is made within this rule to a federal statutory provision, an industry consensus standard, or any other technical publication, the specific date and title of the publication as well as the name and address of the promulgating agency are listed in rule 4101:8-44-01 of the Administrative Code. The application of the referenced standards shall be limited and as prescribed in section 102.5 of rule 4101:8-1-01 of the Administrative Code.]

SECTION 2901

GENERAL

Deleted. See the Plumbing Code.

SECTION 2902

PROTECTION OF POTABLE WATER SUPPLY

Deleted. See Section 608 of the Plumbing Code.

SECTION 2903

WATER SUPPLY SYSTEM

Deleted. See Section 603 of the Plumbing Code.

SECTION 2904

DWELLING UNIT FIRE SPRINKLER SYSTEMS

2904.1General. The design and installation of residential fire sprinkler systems shall be in accordance with NFPA 13, NFPA 13R, NFPA 13D or Section 2904, which shall be considered to be equivalent to NFPA 13D. Partial residential sprinkler systems shall be permitted to be installed only in buildings not required to be equipped with a residential sprinkler system. Section 2904 shall apply to stand-alone electrical and multipurpose wet-pipe sprinkler systems that do not include the use of antifreeze. A multipurpose fire sprinkler system shall provide domestic water to both fire sprinklers and plumbing fixtures. A stand-alone sprinkler system shall be separate and independent from the water distribution system. A backflow preventer shall not be required to separate a sprinkler system from the water distribution system, provided that the sprinkler system complies with all of the following:
1. The system complies with NFPA 13, NFPA 13R, NFPA 13D or Section 2904.
2. The piping material complies with Section 2906 and the plumbing code.
3. The system does not contain antifreeze.
4. The system does not have a fire department connection.
2904.1.1Required sprinkler locations. Sprinklers shall be installed to protect all areas of a dwelling unit.

Exceptions:

1. Attics, crawl spaces and normally unoccupied concealed spaces that do not contain fuel-fired appliances do not require sprinklers. In attics, crawl spaces and normally unoccupied concealed spaces that contain fuel-fired equipment, a sprinkler shall be installed above the equipment; however, sprinklers shall not be required in the remainder of the space.
2. Clothes closets, linen closets and pantries not exceeding 24 square feet ( 2.2 m2) in area, with the smallest dimension not greater than 3 feet (915 mm) and having wall and ceiling surfaces of gypsum board.
3. Bathrooms not more than 55 square feet ( 5.1 m2) in area.
4. Garages; carports; exterior porches; unheated entry areas, such as mud rooms, that are adjacent to an exterior door; and similar areas.
2904.2Sprinklers. Sprinklers shall be new listed residential sprinklers and shall be installed in accordance with the sprinkler manufacturer's instructions.
2904.2.1Temperature rating and separation from heat sources. Except as provided for in Section 2904.2.2, sprinklers shall have a temperature rating of not less than 135°F (57°C) and not more than 170°F (77°C). Sprinklers shall be separated from heat sources as required by the sprinkler manufacturer's installation instructions.
2904.2.2Intermediate temperature sprinklers. Sprinklers shall have an intermediate temperature rating not less than 175°F (79°C) and not more than 225°F (107°C) where installed in the following locations:
1. Directly under skylights, where the sprinkler is exposed to direct sunlight.
2. In attics.
3. In concealed spaces located directly beneath a roof.
4. Within the distance to a heat source as specified in Table 2904.2.2.

TABLE 2904.2.2

LOCATIONS WHERE INTERMEDIATE TEMPERATURE SPRINKLERS ARE REQUIRED

HEAT SOURCE

RANGE OF DISTANCE FROM HEAT SOURCE WITHIN WHICH INTERMEDIATE TEMPERATURE SPRINKLERS ARE REQUIREDa, b (inches)

Fireplace, side of open or recessed

12 to 36

Fireplace, front of recessed fireplace

36 to 60

Coal and wood burning stove

12 to 42

Kitchen range top

9 to 18

Oven

9 to 18

Vent connector or chimney connector

9 to 18

Heating duct, not insulated

9 to 18

Hot water pipe, not insulated

6 to 12

Side of ceiling or wall warm air register

12 to 24

Front of wall mounted warm air register

18 to 36

Water heater, furnace or boiler

3 to 6

Luminaire up to 250 watts

3 to 6

Luminaire 250 watts up to 499 watts

6 to 12

For SI: 1 inch = 25.4 mm.

a. Sprinklers shall not be located at distances less than the minimum table distance unless the sprinkler listing allows a lesser distance.
b. Distances shall be measured in a straight line from the nearest edge of the heat source to the nearest edge of the sprinkler.
2904.2.3Freezing areas. Piping shall be protected from freezing as required by Section 2603.5and the plumbing code. Where sprinklers are required in areas that are subject to freezing, dry-side-wall or dry-pendent sprinklers extending from a nonfreezing area into a freezing area shall be installed.
2904.2.4Sprinkler coverage. Sprinkler coverage requirements and sprinkler obstruction requirements shall be in accordance with Sections 2904.2.4.1 and 2904.2.4.2.
2904.2.4.1Coverage area limit. The area of coverage of a single sprinkler shall not exceed 400 square feet (37 m2) and shall be based on the sprinkler listing and the sprinkler manufacturer's installation instructions.
2904.2.4.2Obstructions to coverage. Sprinkler discharge shall not be blocked by obstructions unless additional sprinklers are installed to protect the obstructed area. Additional sprinklers shall not be required where the sprinkler separation from obstructions complies with either the minimum distance indicated in Figure 2904.2.4.2 or the minimum distances specified in the sprinkler manufacturer's instructions where the manufacturer's instructions permit a lesser distance.

Click to view image

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.

FIGURE 2904.2.4.2

MINIMUM ALLOWABLE DISTANCE BETWEEN SPRINKLER AND OBSTRUCTION

2904.2.4.2.1Additional requirements for pendent sprinklers. Pendent sprinklers within 3 feet (915 mm) of the center of a ceiling fan, surface-mounted ceiling luminaire or similar object shall be considered to be obstructed, and additional sprinklers shall be installed.
2904.2.4.2.2Additional requirements for side-wall sprinklers. Sidewall sprinklers within 5 feet (1524 mm) of the center of a ceiling fan, surface-mounted ceiling luminaire or similar object shall be considered to be obstructed, and additional sprinklers shall be installed.
2904.2.5Sprinkler installation on systems assembled with solvent cement. The solvent cementing of threaded adapter fittings shall be completed and threaded adapters for sprinklers shall be verified as being clear of excess cement prior to the installation of sprinklers on systems assembled with solvent cement.
2904.2.6Sprinkler modifications prohibited. Painting, caulking or modifying of sprinklers shall be prohibited. Sprinklers that have been painted, caulked, modified or damaged shall be replaced with new sprinklers.
2904.3Sprinkler piping system. Sprinkler piping shall be supported in accordance with requirements for cold water distribution piping. Sprinkler piping shall comply with the requirements for cold water distribution piping. For multipurpose piping systems, the sprinkler piping shall connect to and be a part of the cold water distribution piping system.

Exception: For plastic piping, it shall be permissible to follow the manufacturer's installation instructions.

2904.3.1Nonmetallic pipe and tubing. Nonmetallic pipe and tubing, such as CPVC, PEX, and PE-RT shall be listed for use in residential fire sprinkler systems.
2904.3.1.1Nonmetallic pipe protection. Nonmetallic pipe and tubing systems shall be protected from expo- sure to the living space by a layer of not less than 3/8-inch-thick ( 9.5 mm) gypsum wallboard, 1/2-inch-thick (13mm) plywood, or other material having a 15-minute fire rating.

Exceptions:

1. Pipe protection shall not be required in areas that do not require protection with sprinklers as specified in Section 2904.1.1.
2. Pipe protection shall not be required where exposed piping is permitted by the pipe listing.
2904.3.2Shutoff valves prohibited. With the exception of shutoff valves for the entire water distribution system, valves shall not be installed in any location where the valve would isolate piping serving one or more sprinklers.

Exception:A separate control valve is permitted to be installed in the sprinkler system piping provided the valve is supervised in one of the following methods:

1.Central station, proprietary, or remote station alarm service, or
2.Local alarm service that causes the sounding of an audible signal at a constantly attended location, or
3.Valves that are locked open
2904.3.3Single dwelling limit. Piping beyond the service valve located at the beginning of the water distribution system shall not serve more than one dwelling.
2904.3.4Drain. A means to drain the sprinkler system shall be provided on the system side of the water distribution shutoff valve.
2904.4Determining system design flow. The flow for sizing the sprinkler piping system shall be based on the flow rating of each sprinkler in accordance with Section P2904.4.1 and the calculation in accordance with Section 2904.4.2.
2904.4.1Determining required flow rate for each sprinkler. The minimum required flow for each sprinkler shall be determined using the sprinkler manufacturer's published data for the specific sprinkler model based on all of the following:
1. The area of coverage.
2. The ceiling configuration.
3. The temperature rating.
4. Any additional conditions specified by the sprinkler manufacturer.
2904.4.2System design flow rate. The design flow rate for the system shall be based on the following:
1. The design flow rate for a room having only one sprinkler shall be the flow rate required for that sprinkler, as determined by Section 2904.4.1.
2. The design flow rate for a room having two or more sprinklers a shall be determined by identifying the sprinkler in that room with the highest required flow rate, based on Section 2904.4.1, and multiplying that flow rate by 2.
3. Where the sprinkler manufacturer specifies different criteria for ceiling configurations that are not smooth, flat and horizontal, the required flow rate for that room shall comply with the sprinkler manufacturer's instructions.
4. The design flow rate for the sprinkler system shall be the flow required by the room with the largest flow rate, based on Items 1, 2 and 3.
5. For the purpose of this section, it shall be permissible to reduce the design flow rate for a room by subdividing the space into two or more rooms, where each room is evaluated separately with respect to the required design flow rate. Each room shall be bounded by walls and a ceiling. Openings in walls shall have a lintel not less than 8 inches (203 mm) in depth and each lintel shall form a solid barrier between the ceiling and the top of the opening.
2904.5Water supply. The water supply shall provide not less than the required design flow rate for sprinklers in accordance with Section 2904.4.2 at a pressure not less than that used to comply with Section 2904.6.
2904.5.1Water supply from individual sources. Where a dwelling unit water supply is from a tank system, a private well system or a combination of these, the available water supply shall be based on the minimum pressure control setting for the pump.
2904.5.2Required capacity. The water supply shall have the capacity to provide the required design flow rate for sprinklers for a period of time as follows:
1. Seven minutes for dwelling units one story in height and less than 2,000 square feet (186 m2) in area.
2. Ten minutes for dwelling units two or more stories in height or equal to or greater than 2,000 square feet (186 m2) in area.

Where a well system, a water supply tank system or a combination thereof is used, any combination of well capacity and tank storage shall be permitted to meet the capacity requirement.

2904.6Pipe sizing. The piping to sprinklers shall be sized for the flow required by Section 2904.4.2. The flow required to supply the plumbing fixtures shall not be required to be added to the sprinkler design flow.
2904.6.1Method of sizing pipe. Piping supplying sprinklers shall be sized using the prescriptive method in Section 2904.6.2 or by hydraulic calculation in accordance with NFPA 13D. The minimum pipe size from the water supply source to any sprinkler shall be 3/4 inch (19 mm) nominal. Threaded adapter fittings at the point where sprinklers are attached to the piping shall be not less than 1/2 inch (13 mm) nominal.
2904.6.2Prescriptive pipe sizing method. Pipe shall be sized by determining the available pressure to offset friction loss in piping and identifying a piping material, diameter and length using the equation in Section 2904.6.2.1 and the procedure in Section 2904.6.2.2.
2904.6.2.1Available pressure equation. The pressure available to offset friction loss in the interior piping system (Pt) shall be determined in accordance with the Equation 29-1.

Click to view image(Equation 29-1)

where:

Pt = Pressure used in applying Tables 2904.6.2(4) through 2904.6.2(9).

Psup = Pressure available from the water supply source.

PLsvc = Pressure loss in the water service pipe.

PLm = Pressure loss in the water meter.

PLd = Pressure loss from devices other than the water meter.

PLe = Pressure loss associated with changes in elevation.

P = Maximum pressure required by a sprinkler.

TABLE 2904.6.2(1)

WATER SERVICE PRESSURE LOSS (PLsvc)a,b

FLOW RATEc(gpm)

3/4 -INCH WATER SERVICE PRESSURE LOSS (psi)

1-INCH WATER SERVICE PRESSURE LOSS (psi)

1 1/4 -INCH WATER SERVICE PRESSURE LOSS (psi)

Length of water service pipe (feet)

Length of water service pipe (feet)

Length of water service pipe (feet)

40 or less

41 to 75

76 to 100

101 to 150

40 or less

41 to 75

76 to 100

101 to 150

40 or less

41 to 75

76 to 100

101 to 150

8

5.1

8.7

11.8

17.4

1.5

2.5

3.4

5.1

0.6

1.0

1.3

1.9

10

7.7

13.1

17.8

26.3

2.3

3.8

5.2

7.7

0.8

1.4

2.0

2.9

12

10.8

18.4

24.9

NP

3.2

5.4

7.3

10.7

1.2

2.0

2.7

4.0

14

14.4

24.5

NP

NP

4.2

7.1

9.6

14.3

1.6

2.7

3.6

5.4

16

18.4

NP

NP

NP

5.4

9.1

12.4

18.3

2.0

3.4

4.7

6.9

18

22.9

NP

NP

NP

6.7

11.4

15.4

22.7

2.5

4.3

5.8

8.6

20

27.8

NP

NP

NP

8.1

13.8

18.7

27.6

3.1

5.2

7.0

10.4

22

NP

NP

NP

NP

9.7

16.5

22.3

NP

3.7

6.2

8.4

12.4

24

NP

NP

NP

NP

11.4

19.3

26.2

NP

4.3

7.3

9.9

14.6

26

NP

NP

NP

NP

13.2

22.4

NP

NP

5.0

8.5

11.4

16.9

28

NP

NP

NP

NP

15.1

25.7

NP

NP

5.7

9.7

13.1

19.4

30

NP

NP

NP

NP

17.2

NP

NP

NP

6.5

11.0

14.9

22.0

32

NP

NP

NP

NP

19.4

NP

NP

NP

7.3

12.4

16.8

24.8

34

NP

NP

NP

NP

21.7

NP

NP

NP

8.2

13.9

18.8

NP

36

NP

NP

NP

NP

24.1

NP

NP

NP

9.1

15.4

20.9

NP

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 gallon per minute = 0.063 L/s, 1 pound per square inch = 6.895 kPa.

NP = Not Permitted. Pressure loss exceeds reasonable limits.

a. Values are applicable for underground piping materials listed in Table 2905.4 and are based on an SDR of 11 and a Hazen Williams C Factor of 150.
b. Values include the following length allowances for fittings: 25% length increase for actual lengths up to 100 feet and 15% length increase for actual lengths over 100 feet.
c. Flow rate from Section 2904.4.2. Add 5 gpm to the flow rate required by Section 2904.4.2 where the water service pipe supplies more than one dwelling.

TABLE 2904.6.2(2)

MINIMUM WATER METER PRESSURE LOSS (PLm)a

FLOW RATEb (gallons per minute, gpm)

5/8-INCH METER PRESSURE LOSS (pounds per square inch, psi)

3/4 -INCH METER PRESSURE LESS (pounds per square inch, psi)

1-INCH METER PRESSURE LOSS (pounds per square inch, psi)

8

2

1

1

10

3

1

1

12

4

1

1

14

5

2

1

16

7

3

1

18

9

4

1

20

11

4

2

22

NP

5

2

24

NP

5

2

26

NP

6

2

28

NP

6

2

30

NP

7

2

32

NP

7

3

34

NP

8

3

36

NP

8

3

For SI: 1 inch = 25.4 mm, 1 pound per square inch = 6.895 kPa, 1 gallon per minute = 0.063 L/s.

NP = Not permitted unless the actual water meter pressure loss is known.

a. Table 2904.6.2(2) establishes conservative values for water meter pressure loss or installations where the water meter loss is unknown. Where the actual water meter pressure loss is known, Pm shall be the actual loss.
b. Flow rate from Section 2904.4.2. Add 5 gpm to the flow rate required by Section 2904.4.2 where the water service pipe supplies more than one dwelling.

TABLE 2904.6.2(3)

ELEVATION LOSS (PLe)

ELEVATION (feet)

PRESSURE LOSS (psi)

5

2.2

10

4.4

15

6.5

20

8.7

25

10.9

30

13

35

15.2

40

17.4

For SI: 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa.

TABLE 2904.6.2(4)

ALLOWABLE PIPE LENGTH FOR 3/4-INCH TYPE M COPPER WATER TUBING

SPRINKLER FLOW RATEa(gpm)

WATER DISTRIBUTION SIZE (inch)

AVAILABLE PRESSURE-Pt (psi)

15

20

25

30

35

40

45

50

55

60

Allowable length of pipe from service valve to farthest sprinkler (feet)

8

3/4

217

289

361

434

506

578

650

723

795

867

9

3/4

174

232

291

349

407

465

523

581

639

697

10

3/4

143

191

239

287

335

383

430

478

526

574

11

3/4

120

160

200

241

281

321

361

401

441

481

12

3/4

102

137

171

205

239

273

307

341

375

410

13

3/4

88

118

147

177

206

235

265

294

324

353

14

3/4

77

103

128

154

180

205

231

257

282

308

15

3/4

68

90

113

136

158

181

203

226

248

271

16

3/4

60

80

100

120

140

160

180

200

220

241

17

3/4

54

72

90

108

125

143

161

179

197

215

18

3/4

48

64

81

97

113

129

145

161

177

193

19

3/4

44

58

73

88

102

117

131

146

160

175

20

3/4

40

53

66

80

93

106

119

133

146

159

21

3/4

36

48

61

73

85

97

109

121

133

145

22

3/4

33

44

56

67

78

89

100

111

122

133

23

3/4

31

41

51

61

72

82

92

102

113

123

24

3/4

28

38

47

57

66

76

85

95

104

114

25

3/4

26

35

44

53

61

70

79

88

97

105

26

3/4

24

33

41

49

57

65

73

82

90

98

27

3/4

23

30

38

46

53

61

69

76

84

91

28

3/4

21

28

36

43

50

57

64

71

78

85

29

3/4

20

27

33

40

47

53

60

67

73

80

30

3/4

19

25

31

38

44

50

56

63

69

75

31

3/4

18

24

29

35

41

47

53

59

65

71

32

3/4

17

22

28

33

39

44

50

56

61

67

33

3/4

16

21

26

32

37

42

47

53

58

63

34

3/4

NP

20

25

30

35

40

45

50

55

60

35

3/4

NP

19

24

28

33

38

42

47

52

57

36

3/4

NP

18

22

27

31

36

40

45

49

54

37

3/4

NP

17

21

26

30

34

38

43

47

51

38

3/4

NP

16

20

24

28

32

36

40

45

49

39

3/4

NP

15

19

23

27

31

35

39

42

46

40

3/4

NP

NP

18

22

26

29

33

37

40

44

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1 gallon per minute = 0.963 L/s.

NP = Not Permitted.

a. Flow rate from Section 2904.4.2.

TABLE 2904.6.2(5)

ALLOWABLE PIPE LENGTH FOR 1-INCH TYPE M COPPER WATER TUBING

SPRINKLER FLOW RATEa (gpm)

WATER DISTRIBUTION SIZE (inch)

AVAILABLE PRESSURE-Pt (psi)

15

20

25

30

35

40

45

50

55

60

Allowable length of pipe from service valve to farthest sprinkler (feet)

8

1

806

1075

1343

1612

1881

2149

2418

2687

2955

3224

9

1

648

864

1080

1296

1512

1728

1945

2161

2377

2593

10

1

533

711

889

1067

1245

1422

1600

1778

1956

2134

11

1

447

586

745

894

1043

1192

1341

1491

1640

1789

12

1

381

508

634

761

888

1015

1142

1269

1396

1523

13

1

328

438

547

657

766

875

985

1094

1204

1313

14

1

286

382

477

572

668

763

859

954

1049

1145

15

1

252

336

420

504

588

672

756

840

924

1008

16

1

224

298

373

447

522

596

671

745

820

894

17

1

200

266

333

400

466

533

600

666

733

799

18

1

180

240

300

360

420

479

539

599

659

719

19

1

163

217

271

325

380

434

488

542

597

651

20

1

148

197

247

296

345

395

444

493

543

592

21

1

135

180

225

270

315

360

406

451

496

541

22

1

124

165

207

248

289

331

372

413

455

496

23

1

114

152

190

228

267

305

343

381

419

457

24

1

106

141

176

211

246

282

317

352

387

422

25

1

98

131

163

196

228

261

294

326

359

392

26

1

91

121

152

182

212

243

273

304

334

364

27

1

85

113

142

170

198

226

255

283

311

340

28

1

79

106

132

159

185

212

238

265

291

318

29

1

74

99

124

149

174

198

223

248

273

298

30

1

70

93

116

140

163

186

210

233

256

280

31

1

66

88

110

132

153

175

197

219

241

263

32

1

62

83

103

124

145

165

186

207

227

248

33

1

59

78

98

117

137

156

176

195

215

234

34

1

55

74

92

111

129

148

166

185

203

222

35

1

53

70

88

105

123

140

158

175

193

210

36

1

50

66

83

100

116

133

150

166

183

199

37

1

47

63

79

95

111

126

142

158

174

190

38

1

45

60

75

90

105

120

135

150

165

181

39

1

43

57

72

86

100

115

129

143

158

172

40

1

41

55

68

82

96

109

123

137

150

164

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1 gallon per minute = 0.963 L/s.

a. Flow rate from Section 2904.4.2.

TABLE 2904.6.2(6)

ALLOWABLE PIPE LENGTH FOR 3/4-INCH CPVC PIPE

SPRINKLER FLOW RATEa (gpm)

WATER DISTRIBUTION SIZE (inch)

AVAILABLE PRESSURE-Pt (psi)

15

20

25

30

35

40

45

50

55

60

Allowable length of pipe from service valve to farthest sprinkler (feet)

8

3/4

348

465

581

697

813

929

1045

1161

1278

1394

9

3/4

280

374

467

560

654

747

841

934

1027

1121

10

3/4

231

307

384

461

538

615

692

769

845

922

11

3/4

193

258

322

387

451

515

580

644

709

773

12

3/4

165

219

274

329

384

439

494

549

603

658

13

3/4

142

189

237

284

331

378

426

473

520

568

14

3/4

124

165

206

247

289

330

371

412

454

495

15

3/4

109

145

182

218

254

290

327

363

399

436

16

3/4

97

129

161

193

226

258

290

322

354

387

17

3/4

86

115

144

173

202

230

259

288

317

346

18

3/4

78

104

130

155

181

207

233

259

285

311

19

3/4

70

94

117

141

164

188

211

234

258

281

20

3/4

64

85

107

128

149

171

192

213

235

256

21

3/4

58

78

97

117

136

156

175

195

214

234

22

3/4

54

71

89

107

125

143

161

179

197

214

23

3/4

49

66

82

99

115

132

148

165

181

198

24

3/4

46

61

76

91

107

122

137

152

167

183

25

3/4

42

56

71

85

99

113

127

141

155

169

26

3/4

39

52

66

79

92

105

118

131

144

157

27

3/4

37

49

61

73

86

98

110

122

135

147

28

3/4

34

46

57

69

80

92

103

114

126

137

29

3/4

32

43

54

64

75

86

96

107

118

129

30

3/4

30

40

50

60

70

81

91

101

111

121

31

3/4

28

38

47

57

66

76

85

95

104

114

32

3/4

27

36

45

54

63

71

80

89

98

107

33

3/4

25

34

42

51

59

68

76

84

93

101

34

3/4

24

32

40

48

56

64

72

80

88

96

35

3/4

23

30

38

45

53

61

68

76

83

91

36

3/4

22

29

36

43

50

57

65

72

79

86

37

3/4

20

27

34

41

48

55

61

68

75

82

38

3/4

20

26

33

39

46

52

59

65

72

78

39

3/4

19

25

31

37

43

50

56

62

68

74

40

3/4

18

24

30

35

41

47

53

59

65

71

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1 gallon per minute = 0.963 L/s.

a. Flow rate from Section 2904.4.2.

TABLE 2904.6.2(7)

ALLOWABLE PIPE LENGTH FOR 1-INCH CPVC PIPE

SPRINKLER FLOW RATEa (gpm)

WATER DISTRIBUTION SIZE (inch)

AVAILABLE PRESSURE-Pt (psi)

15

20

25

30

35

40

45

50

55

60

Allowable length of pipe from service valve to farthest sprinkler (feet)

8

1

1049

1398

1748

2098

2447

2797

3146

3496

3845

4195

9

1

843

1125

1406

1687

1968

2249

2530

2811

3093

3374

10

1

694

925

1157

1388

1619

1851

2082

2314

2545

2776

11

1

582

776

970

1164

1358

1552

1746

1940

2133

2327

12

1

495

660

826

991

1156

1321

1486

1651

1816

1981

13

1

427

570

712

854

997

1139

1281

1424

1566

1709

14

1

372

497

621

745

869

993

1117

1241

1366

1490

15

1

328

437

546

656

765

874

983

1093

1202

1311

16

1

291

388

485

582

679

776

873

970

1067

1164

17

1

260

347

433

520

607

693

780

867

954

1040

18

1

234

312

390

468

546

624

702

780

858

936

19

1

212

282

353

423

494

565

635

706

776

847

20

1

193

257

321

385

449

513

578

642

706

770

21

1

176

235

293

352

410

469

528

586

645

704

22

1

161

215

269

323

377

430

484

538

592

646

23

1

149

198

248

297

347

396

446

496

545

595

24

1

137

183

229

275

321

366

412

458

504

550

25

1

127

170

212

255

297

340

382

425

467

510

26

1

118

158

197

237

276

316

355

395

434

474

27

1

111

147

184

221

258

295

332

368

405

442

28

1

103

138

172

207

241

275

310

344

379

413

29

1

97

129

161

194

226

258

290

323

355

387

30

1

91

121

152

182

212

242

273

303

333

364

31

1

86

114

143

171

200

228

257

285

314

342

32

1

81

108

134

161

188

215

242

269

296

323

33

1

76

102

127

152

178

203

229

254

280

305

34

1

72

96

120

144

168

192

216

240

265

289

35

1

68

91

114

137

160

182

205

228

251

273

36

1

65

87

108

130

151

173

195

216

238

260

37

1

62

82

103

123

144

165

185

206

226

247

38

1

59

78

98

117

137

157

176

196

215

235

39

1

56

75

93

112

131

149

168

187

205

224

40

1

53

71

89

107

125

142

160

178

196

214

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1 gallon per minute = 0.963 L/s.

a. Flow rate from Section 2904.4.2.

TABLE 2904.6.2(8)

ALLOWABLE PIPE LENGTH FOR 3/4-INCH PEX AND PE-RT TUBING

SPRINKLER FLOW RATEa (gpm)

WATER DISTRIBUTION SIZE (inch)

AVAILABLE PRESSURE-Pt (psi)

15

20

25

30

35

40

45

50

55

60

Allowable length of pipe from service valve to farthest sprinkler (feet)

8

3/4

93

123

154

185

216

247

278

309

339

370

9

3/4

74

99

124

149

174

199

223

248

273

298

10

3/4

61

82

102

123

143

163

184

204

225

245

11

3/4

51

68

86

103

120

137

154

171

188

205

12

3/4

44

58

73

87

102

117

131

146

160

175

13

3/4

38

50

63

75

88

101

113

126

138

151

14

3/4

33

44

55

66

77

88

99

110

121

132

15

3/4

29

39

48

58

68

77

87

96

106

116

16

3/4

26

34

43

51

60

68

77

86

94

103

17

3/4

23

31

38

46

54

61

69

77

84

92

18

3/4

21

28

34

41

48

55

62

69

76

83

19

3/4

19

25

31

37

44

50

56

62

69

75

20

3/4

17

23

28

34

40

45

51

57

62

68

21

3/4

16

21

26

31

36

41

47

52

57

62

22

3/4

NP

19

24

28

33

38

43

47

52

57

23

3/4

NP

17

22

26

31

35

39

44

48

52

24

3/4

NP

16

20

24

28

32

36

40

44

49

25

3/4

NP

NP

19

22

26

30

34

37

41

45

26

3/4

NP

NP

17

21

24

28

31

35

38

42

27

3/4

NP

NP

16

20

23

26

29

33

36

39

28

3/4

NP

NP

15

18

21

24

27

30

33

36

29

3/4

NP

NP

NP

17

20

23

26

28

31

34

30

3/4

NP

NP

NP

16

19

21

24

27

29

32

31

3/4

NP

NP

NP

15

18

20

23

25

28

30

32

3/4

NP

NP

NP

NP

17

19

21

24

26

28

33

3/4

NP

NP

NP

NP

16

18

20

22

25

27

34

3/4

NP

NP

NP

NP

NP

17

19

21

23

25

35

3/4

NP

NP

NP

NP

NP

16

18

20

22

24

36

3/4

NP

NP

NP

NP

NP

15

17

19

21

23

37

3/4

NP

NP

NP

NP

NP

NP

16

18

20

22

38

3/4

NP

NP

NP

NP

NP

NP

16

17

19

21

39

3/4

NP

NP

NP

NP

NP

NP

NP

16

18

20

40

3/4

NP

NP

NP

NP

NP

NP

NP

16

17

19

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1 gallon per minute = 0.963 L/s. NP = Not Permitted.

a. Flow rate from Section 2904.4.2.

TABLE 2904.6.2(9)

ALLOWABLE PIPE LENGTH FOR 1-INCH PEX AND PE-RT TUBING

SPRINKLER FLOW RATEa(gpm)

WATER DISTRIBUTION SIZE (inch)

AVAILABLE PRESSURE-Pt (psi)

15

20

25

30

35

40

45

50

55

60

Allowable length of pipe from service valve to farthest sprinkler (feet)

8

1

314

418

523

628

732

837

941

1046

1151

1255

9

1

252

336

421

505

589

673

757

841

925

1009

10

1

208

277

346

415

485

554

623

692

761

831

11

1

174

232

290

348

406

464

522

580

638

696

12

1

148

198

247

296

346

395

445

494

543

593

13

1

128

170

213

256

298

341

383

426

469

511

14

1

111

149

186

223

260

297

334

371

409

446

15

1

98

131

163

196

229

262

294

327

360

392

16

1

87

116

145

174

203

232

261

290

319

348

17

1

78

104

130

156

182

208

233

259

285

311

18

1

70

93

117

140

163

187

210

233

257

280

19

1

63

84

106

127

148

169

190

211

232

253

20

1

58

77

96

115

134

154

173

192

211

230

21

1

53

70

88

105

123

140

158

175

193

211

22

1

48

64

80

97

113

129

145

161

177

193

23

1

44

59

74

89

104

119

133

148

163

178

24

1

41

55

69

82

96

110

123

137

151

164

25

1

38

51

64

76

89

102

114

127

140

152

26

1

35

47

59

71

83

95

106

118

130

142

27

1

33

44

55

66

77

88

99

110

121

132

28

1

31

41

52

62

72

82

93

103

113

124

29

1

29

39

48

58

68

77

87

97

106

116

30

1

27

36

45

54

63

73

82

91

100

109

31

1

26

34

43

51

60

68

77

85

94

102

32

1

24

32

40

48

56

64

72

80

89

97

33

1

23

30

38

46

53

61

68

76

84

91

34

1

22

29

36

43

50

58

65

72

79

86

35

1

20

27

34

41

48

55

61

68

75

82

36

1

19

26

32

39

45

52

58

65

71

78

37

1

18

25

31

37

43

49

55

62

68

74

38

1

18

23

29

35

41

47

53

59

64

70

39

1

17

22

28

33

39

45

50

56

61

67

40

1

16

21

27

32

37

43

48

53

59

64

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1 gallon per minute = 0.963 L/s.

a. Flow rate from Section 2904.4.2.
2904.6.2.2Calculation procedure. Determination of the required size for water distribution piping shall be in accordance with the following procedure:

Step 1-Determine Psup

Obtain the static supply pressure that will be available from the water main from the water purveyor, or for an individual source, the available supply pressure shall be in accordance with Section 2904.5.1.

Step 2-Determine PLsvc

Use Table 2904.6.2(1) to determine the pressure loss in the water service pipe based on the selected size of the water service.

Step 3-Determine PLm

Use Table 2904.6.2(2) to determine the pressure loss from the water meter, based on the selected water meter size.

Step 4-Determine PLd

Determine the pressure loss from devices other than the water meter installed in the piping system supplying sprinklers, such as pressure-reducing valves, backflow preventers, water softeners or water filters. Device pressure losses shall be based on the device manufacturer's specifications. The flow rate used to determine pressure loss shall be the rate from Section 2904.4.2, except that 5 gpm ( 0.3 L/s) shall be added where the device is installed in a water service pipe that supplies more than one dwelling. As an alternative to deducting pressure loss for a device, an automatic bypass valve shall be installed to divert flow around the device when a sprinkler activates.

Step 5-Determine PLe

Use Table 2904.6.2(3) to determine the pressure loss associated with changes in elevation. The elevation used in applying the table shall be the difference between the elevation where the water source pressure was measured and the elevation of the highest sprinkler.

Step 6-Determine Psp

Determine the maximum pressure required by any individual sprinkler based on the flow rate from Section 2904.4.1. The required pressure is provided in the sprinkler manufacturer's published data for the specific sprinkler model based on the selected flow rate.

Step 7-Calculate Pt

Using Equation 29-1, calculate the pressure available to offset friction loss in water-distribution piping between the service valve and the sprinklers.

Step 8-Determine the maximum allowable pipe length

Use Tables 2904.6.2(4) through 2904.6.2(9) to select a material and size for water distribution piping. The piping material and size shall be acceptable if the developed length of pipe between the service valve and the most remote sprinkler does not exceed the maximum allowable length specified by the applicable table. Interpolation of Pt between the tabular values shall be permitted.

The maximum allowable length of piping in Tables 2904.6.2(4) through 2904.6.2(9) incorporates an adjustment for pipe fittings. Additional consideration of friction losses associated with pipe fittings shall not be required.

2904.7Instructions and signs. An owner's manual for the fire sprinkler system shall be provided to the owner. A sign or valve tag shall be installed at the main shutoff valve to the water distribution system stating the following: "Warning, the water system for this home supplies fire sprinklers that require certain flows and pressures to fight a fire. Devices that restrict the flow or decrease the pressure or automatically shut off the water to the fire sprinkler system, such as water softeners, filtration systems and automatic shutoff valves, shall not be added to this system without a review of the fire sprinkler system by a fire protection specialist. Do not remove this sign."
2904.8Inspections. The water distribution system shall be inspected in accordance with Sections 2904.8.1 and 2904.8.2.
2904.8.1Preconcealment inspection. The following items shall be verified prior to the concealment of any sprinkler system piping:
1. Sprinklers are installed in all areas as required by Section 2904.1.1.
2. Where sprinkler water spray patterns are obstructed by construction features, luminaires or ceiling fans, additional sprinklers are installed as required by Section 2904.2.4.2.
3. Sprinklers are the correct temperature rating and are installed at or beyond the required separation distances from heat sources as required by Sections 2904.2.1 and 2904.2.2.
4. The pipe size equals or exceeds the size used in applying Tables 2904.6.2(4) through 2904.6.2(9) or, if the piping system was hydraulically calculated in accordance with Section 2904.6.1, the size used in the hydraulic calculation.
5. The pipe length does not exceed the length permit- ted by Tables 2904.6.2(4) through 2904.6.2(9) or, if the piping system was hydraulically calculated in accordance with Section 2904.6.1, pipe lengths and fittings do not exceed those used in the hydraulic calculation.
6. Nonmetallic piping that conveys water to sprinklers is listed for use with fire sprinklers.
7. Piping is supported in accordance with the pipe manufacturer's and sprinkler manufacturer's installation instructions.
8. The piping system is tested in accordance with Section 2503.7.
2904.8.2Final inspection. The following items shall be verified upon completion of the system:
1. Sprinkler are not painted, damaged or otherwise hindered from operation.
2. Where a pump is required to provide water to the system, the pump starts automatically upon system water demand.
3. Pressure-reducing valves, water softeners, water filters or other impairments to water flow that were not part of the original design have not been installed.
4. The sign or valve tag required by Section 2904.7 is installed and the owner's manual for the system is present.
SECTION 2905

HEATED WATER DISTRIBUTION SYSTEMS

Deleted. See Section 607 of the Plumbing Code.

SECTION 2906

MATERIALS, JOINTS AND CONNECTIONS

Deleted. See Section 605 of the Plumbing Code.

SECTION 2907

CHANGES IN DIRECTION

Deleted. See the Plumbing Code.

SECTION 2908

SUPPORT

Deleted. See Section 308 of the Plumbing Code.

SECTION 2909

DRINKING WATER TREATMENT UNITS

Deleted. See Section 611 of the Plumbing Code.

SECTION 2910

NONPOTABLE WATER SYSTEMS

Deleted. See Section 1301 of the Plumbing Code.

SECTION 2911

ON-SITE NONPOTABLE WATER REUSE SYSTEMS

Deleted. See Section 1301 of the Plumbing Code.

SECTION 2912

NONPOTABLE RAINWATER COLLECTION AND DISTRIBUTION SYSTEMS

Deleted. See Section 1301 of the Plumbing Code.

SECTION 2913

RECLAIMED WATER SYSTEMS

Deleted. See Section 1301 of the Plumbing Code.

Replaces: 4101:8-29-01

Ohio Admin. Code 4101:8-29-01

Effective: 7/1/2019
Five Year Review (FYR) Dates: 07/01/2024
Promulgated Under: 119.03
Statutory Authority: 3781.10(A)(1)
Rule Amplifies: 3781.01, 4740.14, 3791.04, 3781.11, 3781.10, 3781.06
Prior Effective Dates: 01/01/2013