Top Brand Check Valve, 1/2 in, Single, Inline Piston, Brass, MNPT x FNPT - CHK BRS 810-8F8M-B Capacity-20 oz The ASI 3857 is a

The ASI 3857 is a horizontal grab bar unit that measures 1-1/2 inches in diameter

and 1/2" NPT inlet

For installation behind 1/2" thick drywall or mirror

Bradley 107-342 Access Panel-Wall Replacement Part

Top Brand Check Valve, 1/2 in, Single, Inline Piston, Brass, MNPT x FNPT - CHK BRS 810-8F8M-B Capacity-20 oz The ASI 3857 is aIdeal 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.