CHECK VALVES - SPRING LOADED, LOW PSI Pacific Bay Equipment Sale! from $33.90 Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. CHECK VALVES - SPRING LOADED, LOW PSIHolds pump prime without overloading pump suction. PSI: 150 Max Temperature: 250°F Machine-Cast Brass Bodies FPT x FPT Mount Horizontal or Vertical Ranges by thread size, PSI, and Temperature If you need help finding the correct size, give us a call!