How does atrap primerwork

The Model P-1  Trap Primer Valve is a precision device designed to deliver potable water for 1 - 4 floor drains. A pressure drop of 10 PSIG (70 Kpa) is required to activate the priming valve. The Trap Primer must be installed on cold fresh water lines of 1 1/2" diameter or less. The valves operating range is 20 to 80 PSIG (138 to 552 kpa).

The Stefani 20mm Dual Check Valve is designed to prevent cross contamination of non-potable water into safe drinking water. The two spring loaded check valves remain tightly closed until there is a demand for water downstream. In the event that there is reverse of flow direction, the check valves will close and back-flow is prevented.

Trap primer valveinstallation

The Stefani 20mm Dual check valve provides protection in low hazard applications, like meter connections on domestic properties.