Patent ID: 7497228

Claim:
An apparatus for the enhancement of water quality in a subterranean pressurized water distribution system, the apparatus comprising: a flow controlled passage for pressurized water having an inlet adapted for fluid connection to a pressurized water distribution system located beneath the frost line of the ground; a flow control valve disposed along the flow controlled passage for permitting and prohibiting the flow of pressurized water through the flow controlled passage and into a conduit for directing pressurized water received in the inlet to an above ground routing conduit for discharge; programmable electronic control circuitry for controlling the flow of pressurized water through the flow controlled passage by activating and deactivating the flow control valve, the system including a programmable microprocessor system for storing instructions for activating and deactivating the flow control valve,wherein the flow control valve and programable electronic control circuitry are located below the frost line of the ground; a weep hole in the conduit, wherein the weep hole is located below the frost line of the ground, whereby any water remaining in the conduit after closure of the flow control valve can drain out of the conduit; a low pressure relief valve in fluid communication with the weep hole, wherein the relief valve permits water at low pressure to exit out of the conduit, while substantially restricting high pressure flow from exiting the conduit, whereby water is prevented from exiting through the weep hole when the flow control valve is activated; and a double check valve disposed between the weep hole and the low pressure relief valve, whereby backflow of purged water into the flow control passage through the weep hole is prevented.