Grundfos 00525530 Check Valve Assembly 321894-709 ensuring consistent 2-stage firing rates

ensuring consistent 2-stage firing rates between 5" and 10" water column

specifically the W18 and W24 series

this multi-horsepower unit covers 1/3 HP to 1/6 HP requirements

while a lower pitch results in poor heat rejection

Will this fit models using a 48-frame motor

Grundfos 00525530 Check Valve Assembly 321894-709 ensuring consistent 2-stage firing ratesThe Grundfos 00525530 Check Valve Assembly is a critical replacement component engineered specifically for UPS26 99FC and UPS26 99BFC series circulator pumps. As a veteran technician knows, maintaining unidirectional flow is vital in hydronic heating and cooling systems to prevent ghost flows and thermal siphoning. This 1 4 inch check valve kit comes as a complete field service solution, including the high durometer gasket, tailpiece, and specialized