Griffco Valve manufactures high quality chemical feed equipment for pumps and systems. Products include back pressure valves, pressure relief valves, calibration columns, injection valves, corporation stops, and other chemical feed accessories. Griffco is privately held and was established in 1993 and is located in Amherst, NY. All products Griffco manufactures are proudly made in the USA. Griffco is NSF, CE, and ISO 9001 certified.