18-29-606.5.4.3 Covers and support.

   Such tanks shall have bolted watertight covers of the same material as the tank and shall be located and housed to prevent external pollution. The Commissioner of Buildings shall approve the support for all such tanks before the permit is issued.

(Amend Coun. J. 3-5-03, p. 104990, § 48; Amend Coun. J. 11-13-07, p. 14999, Art. II, § 1; Amend Coun. J. 10-14-21, p. 37722, Art. VI, § 25)

18-29-606.5.5 Recycling system for vehicle wash installations.

   All new or newly remodeled commercial and industrial vehicle wash installations shall be equipped with a water recycling system to conserve water. The system shall be composed of a water reuse tank and all necessary piping to insure the cycling of water for more than one washing operation.

18-29-606.5.6 Potable water inlet control and location.

   Potable water inlets to gravity tanks shall be controlled by a ball cock or other automatic supply valve to prevent the tank from overflowing. The inlet shall be terminated as to provide an air gap not less than 4 inches (100 mm) above the overflow.

18-29-606.5.7 Tank drain pipes.

   A valved pipe shall be provided at the lowest point of each tank to permit emptying of the tank. The tank drain pipe shall discharge as required for overflow pipes.

18-29-606.5.8 Prohibited location of potable supply tanks.

   Potable water gravity tanks or manholes of potable water pressure tanks shall not be located directly under any soil or waste piping or any source of contamination.

18-29-606.5.9 Pressure relief valve requirements.

   Each pressure relief valve shall be a minimum of 3/4 inch (20 mm) and shall be equipped with a test lever. In addition, an automatic vacuum relief valve shall be installed on such tanks with a 24-mesh screen of bronze or stainless steel. The area of the screening shall be 50 percent greater than the opening it serves. All equipment of a hydropneumatic system shall be capable to withstand the designed working pressure.

   Exception: This section shall not apply to pressurized captive air diaphragm/bladder tanks.

18-29-606.5.10 Pressure relief valves for hydropneumatic tanks.

   Every pressure tank in a hydropneumatic pressure booster system shall be protected with a pressure relief valve. The pressure relief valve shall be set at a maximum pressure equal to the rating of the tank. The relief valve shall be installed on the supply pipe to the tank or on the tank. The relief valve shall discharge by gravity to a safe place of disposal.

18-29-606.6 Test of distribution pipes.

   The entire water distribution system within buildings shall be tested utilizing a water or air pressure test. All piping, fittings, valves and equipment except any atmospheric tank shall be tested to 1 1/2 times its designed pressure but not less than 100 psi (690 kPa). When the test pressure exceeds 100 psi (690 kPa) only a hydrostatic test shall be given.

(Amend Coun. J. 10-14-21, p. 37722, Art. VI, § 26)