Description
The Xylem-McDonnell & Miller SA51S-6 Valve Assembly is a water feed part designed to regulate the flow of make-up water into compatible boiler water feeder systems. It operates with the feeder’s float and bellow mechanism to automatically open or close the water supply in response to changing boiler water levels, maintaining proper operating conditions. It mounts as a direct unit within the feeder assembly used in hydronic HVAC systems. It supports accurate water level control, protects equipment from low-water conditions, and promotes dependable heating system operation.









