Top Brand Check Valve, 1/8 in, Single, Inline Piston, Stainless Steel, FNPT x FNPT - CHK SST 215-2F2F-F Width-12" Extra-large window lets you know

Extra-large window lets you know when it's time to refill

The Universal Plus pad is chemically inert and designed for use with aggressive fluids

The flame-resistant material won't burn immediately like cellulose mats

Mat has yellow border that complies with OSHA Code 1910-144

Top Brand Check Valve, 1/8 in, Single, Inline Piston, Stainless Steel, FNPT x FNPT - CHK SST 215-2F2F-F Width-12" Extra-large window lets you knowThis compact spring check valve can be installed in tight spaces to provide backflow protection for a variety of applications. The first connection listed is the direction of flow. The poppet design provides a positive seal down to approximately 1 2 psi.