PRODUCT FEATURES These check valves can be used for a wide range of air and fluid applications. Polypropylene FKM seals 302 SS spring High flow rate Positive seal at very low back pressure or slight vacuum Check mechanism: Disc poppet Cracking pressure: 1/3 psi Maximum pressure: 125 psi Maximum temperature: 140°F Dimensions: 2.75" L x 1.75" W 1/2" FPT Reviews Featured Products 3/4" Polypropylene Check Valve $18.21 Add to Cart Spears Polypropylene Ball Valve 1/2" $38.40 Add to Cart Spears Polypropylene Ball Valve 1" $57.82 Add to Cart Polypropylene Tee 1/2" $2.00 $5.42 Add to Cart