(A) The discharge pipe of an air gap shall terminate a minimum of two pipe diameters of the discharge pipe or six inches, whichever is the lesser above the maximum record flood level or above the flood level rim of the receiving vessel, whichever is higher.
(B) Only those models of double check valve assemblies, reduced pressure principle backflow preventers or pressure type vacuum breakers approved by the Town of Winamac Water Department are acceptable.
(C) Reduced pressure principle backflow preventers shall be installed horizontally, with no plug or additional piping affixed to the pressure differential relief valve port, and with the pressure differential relief valve port a minimum of 12 inches above floor level. Additionally, the device must be installed at a location where any leakage from the pressure differential relief port will be noticed, and that allows access to the device for maintenance and testing from floor level, so that it will not subject the device to flooding, excessive heat or freezing.
(D) All double check valve assemblies shall be installed horizontally at a location that allows access to the device for maintenance and testing from floor level and that will not subject the device to excessive heat or freezing.
(E) Pressure type vacuum breakers shall be installed as near as possible to the irrigation facility, at a location that allows access to the device for maintenance and testing form floor or ground level and that will not subject the device to flooding, excessive heat or freezing. Additionally, the device must be installed with its center line or datum point a minimum of 12 inches above floor level; the highest downstream shut-off valve; and the highest downstream overflow rim or discharge point.
(Ord. 10 of 2015, passed 10-12-2015)