DFT Inc. manufactures a line of wafer check valves that feature an in-line, spring-assisted design, or a compact, lightweight insert design. The company's largest line of wafer valves - the WLC series - are available in sizes of 1", 1-1/2", 2" to 8", and 10", and in classes of 150 or 300. The WLC wafer valves feature cracking pressure ranging from 0.17 psig to 0.66 psig.

Crispin-Multiplex Mfg. Co. produces wafer silent check valves that feature a cast iron body, a maximum temperature rating of 150F, and ANSI Class 125 and Class 250. Used for potable water or drip tight applications, the valves are fully automatic, spring loaded and double guided. The valves are available in sizes 2"-10".