plumbingdrainagelegalsafety
What is cross-connection control on a splash pad?
Quick answer
Cross-connection control prevents non-potable water from contaminating the city potable supply through siphonage. Splash pads require a reduced-pressure-zone (RPZ) backflow assembly on the supply line, tested annually by a certified tester, with results filed with the water utility. Required by all US water utilities.
Cross-connection control is the regulatory framework preventing contamination of municipal potable water supplies through backflow events. A splash pad creates a cross-connection because pad water — chlorinated, recirculated, and exposed to bathers — could siphon back into city mains during a pressure-loss event (water main break, fire-flow demand). Federal and state rules require a reduced-pressure-zone (RPZ) backflow assembly on the supply line feeding the pad. The RPZ uses two check valves and a relief port that opens to atmosphere if either check fails, dumping water rather than allowing backflow. Annual testing by a state-certified backflow tester is mandatory; results must be filed with the local water utility within 30 days. Failure to test triggers immediate water shutoff. Test fee runs $75-$200. The RPZ must be installed above grade with adequate clearance and freeze protection.