Metraflex offers a variety of check valve types. Globe style silent configurations eliminate water hammer with silent operation. Features include a center guided single disc, and bronze to bronze seating with special stainless steel spring control. Pressure/temperature ratings range from 150-200 PSI at 150 degrees. Wafer style silent check valves offer the same features and are rated to both 125 lb. to 250 lb. flange class.

Georg Fischer offers check valves in multiple configurations, including angle seat, ball, gate, and needle types. Angle seat check valves feature PN 10 nominal pressure and PVC and ABS materials. Ball styles are self closing and self cleaning, and come in various materials and end connections. Gate types are PVC wafer designs with vertical or horizontal mounting.

GA Industries manufactures engineered check valves that can be used in rigorous applications. They offer benefits such as non-slam operation, surge reduction, low headloss and operational adjustability. Their cushioned swing check valve is a counter-weighted to close before flow reversal, without slam, bang, hammer and shock. Their tilting disc type uses an offset pivot disc design that counter-acts the disc's tendency to be slammed shut by reversing water.

Cole Industrial maintains a line of standard swing check valves in an assortment of body, disc, and seating materials. Products includes swing, wafer, cone, ball and in-line disc check valves. Cole Industrial supplies Newco, Conbraco, Sure Flow, and Mueller products.

Superior provides check valves of carbon/stainless steel, cast bronze, ductile iron, carbon steel, and stainless steel materials. Wafer types have a short pattern style. Silent types have a in-line and threaded style. Single disc configurations are in a swing and wafer style. Dual disc styles feature a wafer design.

Air Inc. is a supplier of PneuTrol inline check valves in 10 different models. Sizes range from 1/8" NPT to 1/2" NPT. Types can be either metal-to-metal seat or soft seat. Materials available include brass, stainless steel and steel.

Swagelok provides a line of adjustable and fixed cracking pressure check valves, including spring and poppet, lift, all-welded, ultrahigh purity O-ring-free fluropolymer, and disk/ball/air blow styles. Swagelok spring-and-poppet check valves feature nominal cracking pressures ranging from 1/3 to 600 psi, stainless steel and brass materials, and end connections in sizes 1/8 to 1 inches.

Watts supplies WATTS ACV non-surge check valve in the models F118-3, F1118-3, F118-4 and F1118-4. The F118-3 and F1118-3 non-surge types control pipeline surges in sizes 4 inches and smaller. F118-4 and F1118-4 models are available in sizes 6 inches and larger.

Snap-Tite produces check valves with various spring pressures and seal options. The CPIFF series are one piece, inline design in a size range from 1/4 to 1 inches with working pressures up to 5,000 psi, plated steel or brass construction and flow rates up to 30 gpm. The 6C & 3C series are two piece, inline check valves in a size range from 1/4 to 1 inches for 6C series and from 1/4 to 2 inches for 3C series.

Crispin supplies check valves that meet ANSI/AWWA C512 standards and are ANSI/AWWA C508 compliant. Products include FV series foot, GC series globe, RF series rubber flapper, SWC series swing, TD series tilting disc, SC series surge, and the WC series wafer check valves.

Innovative Pressure Technologies produces standard, pipe and low pressure check valves suited for a psi range from 20,000 to 60,000 and available in ball seat poppet and soft seat poppet styles. Pipe check valves are suited for a psi range from 10,000 to 15,000 and available in ball seat poppet, soft seat poppet, and dual seal ball styles.

Kinequip provides check valves in multiple series with various body materials, O-rings, operating pressure PSIG, cracking pressure, temperature range and connections. Body materials include aluminum, brass, carbon steel, and various stainless steel types. Types of O-rings includes Buna N, Viton, ethylene, propylene, flourosilicone, Kalrez, neoprene, Teflon, and Viton.

Matco-Norca distributes an extensive selection of check valves of various styles, including brass and PVC. Brass styles include threaded and seat brass, neoprene seat brass, bronze, brass inline, and brass foot valves. PVC types include PVC inline, PVC inline with SS spring, and plastic sump pump designs.

Plastomatic supplies plastic check valves in three various series with automatic bubble-tight seal. Series CKM and CK are diaphragm operated, self sealing, and normally closed. Series CKS feature a PFA encapsulated spring design, normal closing, and zero reverse flow valve in pipe sizes of 1-1/2", 2", and 3". Series CKD are 1/4" and 1/2" valves with a flexible elastomer disk in Geon PVC, natural polypro, PTFE and Kynar PVDF.

Lee supplies check valves in a variety of sizes and in forward or reverse flow, and with zero leak, low cracking pressure, no valve noise or wear and screens. Lee Lo-Lohm Cheks are poppet-style, high flow-gain styles with the lowest Lohm rate, in sizes of 0.187, 0.250, 0.375 and 0.500 inch diameters, and in both forward and reverse flow directions. Lee Hi-Q Chek types are compatible with valve cartridges between 1/2 and 1 inch in diameter and also feature a unique cage and poppet assembly.