1/2" A200 Flow-Through Trap Primer (Threaded)

The Watts A200 is a unique new design which assures delivery of water to the trap to assure against evaporation of the water seal. No. A200 operates by the water flow acting against the main reaction disc (1), which forces the reaction disc in the upward position and removes the trap disc (2) from the plastic trap seat (3). A spurt of water is then delivered to the trap. However, with increased flow, the main reaction disc (1) continues to lift and seals off the closing disc (4) to stop flow to the trap. When the flow through the valve is stopped, the trap disc (2) is returned to the closed position, and in the process, delivers a spurt of water to the trap before closing off.

The importance of this design is that a complete flow cycle through the valve from open to close will actuate the primer twice with two definite pulses; once on opening and once on closing, thus providing a tremendous water savings over competitive models. This is an exclusive Watts feature.