Specialty Manufacturing Co offers plastic check valves in a wide range of sizes and configurations including the 695 ball check valve with a design that incorporates a stainless ball that seals on an o-ring seat. Other plastic check ball valves from SMC including the 427 series poppet check valve, 426 series foot valve, and 687 series poppet valve.

Hayward Flow Control's line of manual plastic check valves includes models with various configurations, such as the TC series true union, YC series Y, SLC spring loaded Y, SW series swing, and WC series wafer plastic check valves.

Flomatic manufactures a variety of check valve products including plastic check valves in a variety of sizes from 3/8" up to 1 1/4". Models include the 100MP, 901 series, 297D, and 290 P. Danfoss Flomatic plastic ball check valves are made from high-strength Noryl GTX 830 with NITRILE seal and polypropylene follower.

Simtech offers plastic check valves in a variety of models including the VQ Series true union ball check valve with true union end connectors for easy maintenance, as well as the WC series wafer check valve with a light-weight, chemical resistant design. Simtech also offers their VS series plastic horizontal swing check valves.

Industrial Specialties Mfg offers a variety of plastic check valves including push-in models and conventional plastic check valves. Conventional plastic types come in duckbill, spring loaded and diaphragm configurations in a variety of sizes. Push-in types come in six varieties.

Plast-O-Matic Valves, Inc. manufactures a variety of valve products including the True Blue series plastic check valves made from PVC, CPVC, PVDF, PP and PTFE. These plastic check valves are engineered to help stop unwanted reverse flow with an automatic bubble-tight seal. These models are available in a variety of sizes.

Pneuline Supply manufactures plastic check valves for use in biomedical, medical, and industrial applications. Plastic check valve models include diaphragm, duckbill and spring loaded valves. Also available are PVDF and PVC check valves for chemical applications.

U.S. Plastic corp is a distributor of a variety of check valve products including a wide selection of plastic check valves from manufacturers including NIBCO, Hayward Flow Controls and SMC.

Valve Check Inc. manufactures the 3100 series plastic cartridge check valves used for air or liquid in low pressure manifold or tubing applications. 3100 series models come ing 1/4", 3/8", 1/2" and 5/8" sizes.

Ark-Plas Products offers check valves molded with a variety of plastics including nylon, polypropylene, natural Kynar and polycarbonate and diaphragms made from a choice of silicone, neoprene or viton. Other features including free floating diaphragms, application range of 1 - 150 PSI and threaded barbed combo connection. Models including standard check valves, enlarging check valves, reducing check valves, and luer check valves.