Air release valves shall be two-inch Crispin Pressure Air Valves, Model P20, with a vacuum check unit, two-inch Val-Matic, Model VM-45, with a vacuum check unit or equal as approved by the Director of Public Utilities. These valves shall be suitable for 150 psi working pressure and designed to allow air to escape automatically while the main is in service and under pressure. The valve shall be housed in an approved eccentric manhole and shall be installed in accordance with the Standard Detail of these specifications. Air release valve locations shall be approved by the Director of Public Utilities and shown on the plans.
(Ord. passed 6-21-2011)