D.C. Mun. Regs. tit. 21, r. 21-301
A meter setter and other approved fittings designed to receive a water meter, shall be a part of the water supply system of all buildings and are to be provided by the owners, the owners agent, the builder, the occupant or the consumer.
The General Manager may install a meter setter or other approved fittings designed to receive a water meter and may recover all costs of such installation by agreements with consumers. In cases where special costs of installation are recovered through agreements with consumers, the General Manager shall identify all costs of installation in advance of installation.
The meter setter or other similar device shall be set in a horizontal position and shall be connected to the water service by risers of brass pipe or copper tubing so that the inlet and outlet of the appliance where the water meter is to be installed shall be at least eighteen inches (18 in.) below the permanent surface of the ground, as indicated on Drawing No.G-815.
With the exception of a stop valve, no other outlet will be permitted between the meter setter and the water main in the street.
The Authority may permit the installation of a meter setter or other similar device in a cellar or basement; provided, that the meter setter or other similar device shall be installed in a horizontal position adjacent to the wall where the water service enters the building, or at such other location as may be approved by the General Manager and shall be placed so that at all times it will be unobstructed and there will be easy access for examination, reading data transmission and replacement.
Whenever water is introduced into a new building, a registered or licensed plumber, who shall be retained by the owner, owner's agent, builder, occupant or consumer shall be responsible for ascertaining permanent grade, attaching the meter setter to the service pipe, making a suitable opening for the placement of meter housing, in accordance with the Authority's requirements. The registered or licensed plumber shall provide at least 3- business days' notice to the Customer Service Department for the Authority to install meter(s). The General Manager may waive all or any portion of this notice.
Persons who install meter setters and other approved fittings, shall comply with all plumbing code and WASA permit requirements.
D.C. Mun. Regs. tit. 21, r. 21-301