CHECK VALVE 3/4" INLINE BRASS MM1 Hotsy Pacific Sale! from $36.40 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 LoadedHolds pump prime without overloading pump suction. PSI: 1200 Max Temperature: 250°F Cracking Pressure PSI: 1 Machined-Brass Body Stainless Steel Springs Poppet Seal 3/4", M x M