Type of product: Air Check Valve Specification: 1.5" S x 1.5" S Most common size reference: 1.5 inch Outer overall dimensions: Length:130mm Diameter:85mm Internal Diameter:49mm Commonly used with: 1.5 inch rigid pipe and 1.5 inch flexible rigid pipe. Spaform Spas and others, this is a fairly generic part. Additional notes: To be used in an air loop to stop water getting back into the blower. 1/4lb of pressure.
