The Watts 0121225 Outdoor Water Regulator Valve is a pressure-regulating component designed to control water flow in compatible hydronic HVAC and water heating systems. Rated for 0–30 PSI, the 123LP-3/4" valve reduces and maintains incoming water pressure at a controlled level to protect connected equipment and piping. It is suitable for boiler feed, hydronic heating, and other water-... https://www.partshnc.com/0121225-watts-123lp-34-030outwtrregvlv