Description
The Taco 555-055RP Valve & Seat Assembly is an internal component used in hydronic circulators and pumps to control fluid flow through check or shut‑off valves in HVAC systems. It consists of a precision-matched valve and seat that regulate movement and sealing within the pump, helping prevent backflow and ensuring proper circulation. It is used inside compatible circulator housings in the units hydronic heating or cooling systems. It works with impellers and motor controls to maintain consistent flow and system efficiency where dependable fluid control is required.









