18-29-606.4 Valve identification.

   Service and hose bibb valves shall be identified. All other valves installed in locations that are not adjacent to the fixture or appliance shall be identified, indicating the fixture or appliance served.

18-29-606.5 Water pressure booster systems.

   Water pressure booster systems shall be provided as required by Sections 18-29-606.5.1 through 18-29-606.5.10.

18-29-606.5.1 Hydropneumatic system, booster pump system, gravity tank.

   When the water pressure in the city water main is insufficient to furnish an adequate water supply for any purpose in any building, structure or premises, a hydropneumatic system, booster pump system, or gravity tank shall be installed.

18-29-606.5.1.1 Requirements.

   All hydropneumatic systems shall consist of a water pump or pumps and a pressure tank and shall be provided with controls to insure complete automatic operation.

(Amend Coun. J. 10-14-21, p. 37722, Art. VI, § 23)

18-29-606.5.1.1.1 Pressure relief valve.

   Each pump serving such tanks shall have a pressure relief valve on the discharge side capable of relieving water pressure in excess of the designed working pressure of such tanks.

18-29-606.5.1.1.2 Compression tank.

   Each compression tank shall be so connected that the air content thereof shall be no less than 25 percent of its total capacity. Each compression tank shall be provided with a sludge drain pipe which shall be connected to such tank at the lowest level of the bottom section thereof and shall discharge through an indirect connection into the drainage system with a minimum air gap of 6 inches (150 mm).

18-29-606.5.1.1.3 Sludge drain pipe.

   Each sludge drain pipe shall be equal in size to the inlet pipe but need not exceed 2 inches (50 mm) and shall be provided with a control valve having a clear waterway equal in area to that of the sludge drain pipe.

18-29-606.5.1.2 Booster pump system.

   Booster pump systems may be of the constant speed type or the variable frequency drive type. Each pump or pumps shall have sufficient capacity to furnish an adequate supply of water for any purpose. When one pump is installed it shall run continuously or when a multipump system is installed the lead pump shall run continuously. A pressure reducing valve shall be installed on the discharge side of each constant speed pump.

18-29-606.5.1.2.1 Gravity tanks.

   Gravity tanks operating at atmospheric pressure shall be installed as required by Section 18-29-606.5.4.