Bypass excess liquid and maintain control of fluid flow with the Valley Industries 400 PSI Pressure Relief Valve. Featuring 3/4” MNPT inlet & ¾” FNPT outlet ports for quick connections. Includes positive Viton seals to prevent unwanted leaking. Make easy pressure adjustments with the brass knurled locknut and tee-handle adjustment screw. Handles up to 400 PSI, 15 GPM and 120° F. Made of nylon and brass construction for long-lasting durability against corrosion and other aggressive chemicals.