New Snow Performance high flow check valves offer superior safety and flow requirements compared to other water-methanol check valves on the market. Custom made with 100% methanol resistant stainless steel spring, snap ring, and EPDM seals for no corrosion even with high methanol concentrations. Black anodized with Snow Performance Running S logo. 20 PSI cracking pressure, 1/8" NPT ports, 4AN Fittings, 100% methanol resistant.