Top Brand Check Valve, 1/2 in, Single, Inline Piston, Brass, MNPT x FNPT - CHK BRS 810-8M8F-B trimline Operating Pressure Differential Air/Inert Gas:

Operating Pressure Differential Air/Inert Gas: 40 psi

Includes: Sleeve

or has a flush that's too short or too long

Speakman RPG04-0433-BN SB-1011 Neo Centerset Handle Repair Group

Top Brand Check Valve, 1/2 in, Single, Inline Piston, Brass, MNPT x FNPT - CHK BRS 810-8M8F-B trimline Operating Pressure Differential Air/Inert Gas:Ideal for installation in tight spaces, this piston spring check valve can provide backflow protection for a variety of applications. Model has an embedded O ring that seals on the seat. Pressure in the direction of flow moves the piston and seal off the seat and exposes the cross holes in the piston. Valve is designed to provide a positive seal at very low back pressure or slight vacuum.