Section Env-Wq 1109.06 - Piping(a) All visible piping, including waste lines and valves and other fittings, shall be: (1) Color coded as specified in (b), below;(2) Labeled to identify its purpose; and(3) Marked to show the direction of flow.(b) Unless otherwise specified in an applicable plumbing or building code or local ordinance, the color coding required by (a), above, shall be as specified in Table 1109-1, below: Table 1109-1: Color Coding for Visible Piping, Valves, and Fittings
Purpose | Color |
Potable Water | Dark blue |
Skimmer or Gutter | Olive Green |
Pool Return | Light blue |
Main Drain | Black |
Alum | Orange |
Chlorine, gas or solution | Yellow |
Soda Ash | White |
Acid | Pink |
Backwash | Dark Brown |
Sewer or other wastewater | Dark Gray |
Deck Drains | Light Brown |
Gas other than chlorine or compressed air | Red |
Compressed Air | Dark Green |
(c) If plastic pipe is proposed, a minimum of Schedule 40 rigid PVC or equivalent that can withstand operating pressures shall be used.(d) Flexible pipe shall not be used for pools.(e) Flexible PVC hoses that meet NSF Standard 50 may be affixed to spa shells where rigid pipes do not provide the necessary angles to connect circulation components.(f) Piping shall be designed to carry the required quantity of water at a maximum velocity not to exceed 6 fps for suction piping, and not to exceed 10 fps for discharge piping except for copper pipe where the velocity shall not exceed 8 fps.(g) Return lines, main drain lines, and surface overflow system lines shall each be equipped with proportioning valves.N.H. Admin. Code § Env-Wq 1109.06
(See Revision Note at chapter heading for Env-Wq 1100) #8468, eff 11-1-05
Readopted with Amendments byVolume XXXIV Number 19, Filed May 8, 2014, Proposed by #10577, Effective 5/1/2014, Expires5/1/2024 See Revission note.Amended by Volume XLI Number 19, Filed May 13, 2021, Proposed by #13198, Effective 5/1/2021, Expires 5/1/2031 (see Revision Note #3 at chapter heading for Env-Wq 1100) (formerly Env-Wq 1106.06)