Watts Datasheets for Check Valves

Check valves are self-activating safety valves that permit gases and liquids to flow in only one direction, preventing process flow from reversing. They are classified as one-way directional valves. 
Check Valves: Learn more

Product Name Notes
Complete brine tank assembly including: overflow, grid, safety valve w/ float, air check and well; Available in blue, black, and almond; up to 1,400 lbs salt capacity.
Complete brine tank assembly including: overflow, safety valve w/ float, and air check; Available in blue, black, and almond; 250 lbs salt capacity.
Designed to automatically limit flow rate to a constant, adjustable, maximum by sensing differential pressure across a remote mounted orifice plate (field installed), and close drip-tight when downstream pressure becomes...
Designed to automatically reduce a fluctuating higher upstream pressure to a constant lower downstream pressure regardless of varying flow rates, and close drip-tight when downstream pressure becomes greater than upstream...
Designed to automatically reduce a fluctuating higher upstream pressure to a constant lower downstream pressure regardless of varying flow rates, throttle to sustain a minimum upstream pressure, and close drip-tight...
Designed to control pipeline surges caused by flow reversal by slowly opening and closing at separate adjustable rates.
Designed to minimize pressure surges associated with the starting and stopping of pumps. The valve opens at an adjustable rate upon pump start-up, and closes at an adjustable rate upon...
Designed to open fully or close drip-tight as commanded by the 3-Way Solenoid Pilot, and close drip-tight when downstream pressure becomes greater than upstream pressure. The solenoid may be activated...
Designed to permit flow when upstream pressure is above the adjustable setpoint of the control pilot, and throttle when upstream pressure falls below the adjustable setpoint. The valve also acts...
Designed to permit flow when upstream pressure is above the adjustable setpoint of the control pilot, and throttle when upstream pressure falls below the adjustable setpoint. The valve closes drip-tight...
Lead Free* Brass Maxi-Flo Check Valves feature a Lead Free* cast copper silicon alloy body with NPT female threaded connections. These silent check valves have a low pressure drop and...
Model LFCS check stop valves are designed for use at the hot and cold water inlet supplies for mixing and temper ing valves. Model LFCS valves perform triple duty as:...
Models 600GD-16 (Globe) and 600AD-16 (Angle) are Ductile Iron, reduced port, dual chamber basic valves that incorporate a two-piece telescoping disc and diaphragm assembly. When pressure is applied to the...
Models 600GS-16 (Globe) and 600AS-16 (Angle) are Stainless Steel, reduced port, dual chamber basic valves that incorporate a two-piece telescoping disc and diaphragm assembly. When pressure is applied to the...
Models 605GD-16 (Globe) and 605AD-16 (Angle) are Ductile Iron, reduced port, single chamber basic valves that incorporate a two-piece telescoping disc and diaphragm assembly. This assembly is the only moving...
Models 605GS-16 (Globe) and 605AS-16 (Angle) are Stainless Steel, reduced port, single chamber basic valves that incorporate a two-piece disc and diaphragm assembly. This assembly is the only moving part...
Models 900GD-16 (Globe) and 900AD-16 (Angle) are Ductile Iron, full port, dual chamber basic valves that incorporate a two-piece telescoping disc and diaphragm assembly. When pressure is applied to the...
Models 900GS-16 (Globe) and 900AS-16 (Angle) are Stainless Steel, full port, dual chamber basic valves that incorporate a two-piece telescoping disc and diaphragm assembly. When pressure is applied to the...
Models 905GD-16 (Globe) and 905AD-16 (Angle) are Ductile Iron, full port, single chamber basic valves that incorporate a two-piece telescoping disc and diaphragm assembly. This assembly is the only moving...
Models 905GS-16 (Globe) and 905AS-16 (Angle) are Stainless Steel, full port, single chamber basic valves that incorporate a two-piece disc and diaphragm assembly. This assembly is the only moving part...
Our check valves are made in New Zealand from high grade glass fiber reinforced nylon. Springloaded non-return check valves allow fluid to flow in one direction only, ideal for many...
Quick-Connect union check valves - polysulfone. 3540B-10 - 1/2 in. CTS
Series 007 Double Check Valve Assemblies prevent the backflow of contaminated water into the potable water supply. It consists of a bronze (1/2 to 2 in) body construction that is...
Series 007DCDA Double Check Detector Assemblies prevent the backflow of non-health hazard fire protection system substances from being pumped or siphoned into the potable water supply. It incorporates a meter...
Series 1000DCV Detector Check Valves are used in fire protection applications to detect leakage or unauthorized use of water in fire or automatic sprinkler systems. It consists of a cast...
Series 1000DCV Detector Check Valves are used in fire protection applications to detect leakage or unauthorized use of water in fire sprinkler systems. This Series features a fabricated steel body...
Series 1000SS Detector Check Valves are used in fire protection applications to detect leakage or unauthorized use of water in fire sprinkler systems. It consists of a stainless steel body...
Series 2000-M5, 2000S-M5 Hydronic, Two-Way, Universal Flow Check Valves are for use in commercial and residential hydronic heating systems to provide positive shutoff when circulator is not running, preventing flow...
Series 2000B Double Check Valve Assemblies prevent the backflow of contaminated water into the potable water supply. It consists of a bronze body construction that is easy to maintain and...
Series 2000BM1-FP / 2000BM2-FP Double Check Valve Assemblies with Gear Operated Slow Close Isolation Valves prevent the backflow of contaminated water into the potable water supply. It consists of a...
Series 2000SS Double Check Valve Assemblies prevent the backflow of polluted water from entering into the potable water supply. It consists of a compact construction and short lay length, ideal...
Series 3000SE Double Check Detector Assembly is ideal for space restricted retrofit installations. It's long life 300 Series stainless steel housing, along with the cartridge check assembly substantially reduces the...
Series 3000SS Double Check Detector Assemblies prevent the backflow of fire protection system substances from being pumped or siphoned into the potable water supply. It consists of a compact construction...
Series 6 Brass Midi Check Valves are used in general industrial and plumbing applications. They feature a brass body with NPT female threaded end connections and positive back stop. Series...
Series 600-Z3 Steam Check Valves are used in high cycle steam applications. They feature a bronze body heavy internal construction for longer life, conical 316 stainless steel disc for full...
Series 601, 601S Bronze Maxi-Flo Check Valves are used to prevent the effects of water hammer in the piping system. They feature a bronze body, Viton disc and integral brass...
Series 709DCDA Double Check Detector Assemblies prevent backflow of non-health hazard fire protection system substances from being pumped or siphoned into the potable water supply. It incorporates a meter to...
Series 719 Double Check Valve Assemblies are designed to protect drinking water supplies from dangerous cross-connections in accordance with national plumbing codes and water authority requirements. It consists of a...
Series 757, 757N Double Check Valve Assemblies prevent the backflow of pollutants that are objectionable but not toxic, from entering into the potable water supply. Its compact housing consists of...
Series 757DCDA, 757NDCDA Double Check Detector Assemblies prevent the backflow of pollutants that are objectionable but not toxic, from entering into the potable water supply. Its compact housing consists of...
Series 774 Double Check Valve Assemblies prevent the backflow of polluted water from entering into the potable water supply. It consists of a compact construction and short lay length, ideal...
Series 774DCDA Double Check Detector Assemblies prevent the backflow of fire protection system substances from being pumped or siphoned into the potable water supply. It consists of a compact construction...
Series 912HP High Pressure Hose Drop Dual Check Vacuum Breakers prevent the reverse flow of polluted water from processing and rendering areas from entering into the potable water supply. It...
Series 9BD Dual Check Vacuum Breakers for Vending Machine Water Supply Lines prevent the reverse flow of contaminates, such as carbon dioxide gas and carbonated water, from entering the potable...
Series 9D Dual Check Valves with Intermediate Atmospheric Vent prevent the reverse flow of hot or cold polluted water from entering into the potable water supply. It consists of a...
Series ACVW-125 Cast Iron Silent Check Valves are designed to prevent water hammer effect. The conical spring design allows the closure disc to travel more distance than other valves of...
Series ASCV Anti-Siphon/Chemigation Check Valves are used to prevent backflow of mixtures of water and chemicals into the water supply. The spring swing silent check valve is extremely efficient. Series...
Series C200, C200N Double Check Valve Assemblies prevent the backflow of pollutants that are objectionable but not toxic, from entering into the potable water supply. Its compact housing consists of...
Series C300, C300N Double Check Valve Assemblies prevent the backflow of pollutants that are objectionable but not toxic, from entering into the potable water supply. Its compact housing consists of...
Series FPP (Plain) and FFF (Flanged) Check Valves are designed to permit free flow in one direction and to prevent return flow in the opposite direction. The unique design of...
Series ICV-125-2-2-T Cast Iron Wafer Check Valves are used in commercial and industrial HVAC applications to prevent water hammer and reverse fluid flow in water lines. They feature a cast...
Series ICVF-125 Cast Iron Silent Check Valves are used in commercial and industrial HVAC applications to prevent water hammer and reverse fluid flow in water lines. Their conical spring design...
Series LF007 Lead Free* Double Check Valve Assemblies prevent the backflow of contaminated water into the potable water supply. It consists of a Lead Free* cast copper silicon alloy (1/2...
Series LF2000B Double Check Valve Assemblies prevent the backflow of contaminated water into the potable water supply. It consists of a Lead Free* cast silicon copper alloy body construction that...
Series LF6 will operate efficiently in silence all of the functions of a swing check or vertical lift check valve. These are not suggested for installation in sewage ejector piping.
Series LF601, LF601S Lead Free* cast copper silicon alloy Maxi-Flo Check Valves are used to prevent the effects of water hammer in the piping system. They feature a Lead Free*...
Series LF709 Lead Free* Double Check Valve Assemblies prevent the reverse flow of polluted water from entering into the potable water supply. It has a modular check design for easy...
Series LF719 Double Check Valve Assemblies are designed to protect drinking water supplies from dangerous cross-connections in accordance with national plumbing codes and water authority requirements. It consists of a...
Series LFH7C Lead Free* Dual Check Valve with Hose Connection prevent the reverse flow of polluted water from entering into the drinking water supply at individual outlets. It consists of...
Series LFWCV, LFWCVS Lead Free* Brass Swing Check Valves are used to prevent reverse fluid flow in water and steam applications. This series features metal-to-metal seal, either threaded NPT or...
Series M200, M200N Double Check Valve Assemblies are specifically designed for high flow fire systems to prevent the backflow of pollutants that are objectionable but not toxic, from entering into...
Series M200Na Double Check Valve Assemblies are specifically designed for high flow fire systems to prevent the backflow of pollutants that are objectionable but not toxic, from entering into the...
Series M300, M300N Double Check Valve Assemblies are specifically designed for high flow fire systems to prevent the backflow of pollutants that are objectionable but not toxic, from entering into...
Series M300Na Double Check Valve Assemblies are specifically designed for high flow fire systems to prevent the backflow of pollutants that are objectionable but not toxic, from entering into the...
Series SCV Service Check Valves are used in heating applications between boiler piping and system components to facilitate the servicing of components under pressure, such as thermal expansion tanks and...
Series SD-2 Dual Check Valves for Carbonated Beverage Machines prevent the reverse flow of contaminated water, such as carbon dioxide gas and carbonated water, from entering into the potable water...
Series SD-3 Dual Check Valves with Atmospheric Port & Strainer for Carbonated Beverage Machines prevent the reverse flow of polluted water, such as carbon dioxide gas and carbonated water, from...
Series SS007 Stainless Steel Double Check Valve Assemblies provide protection to the potable water supply at non-health hazard cross-connections. Series SS007 is ideal in applications where the downstream liquid is...
Series SS07F Stainless Steel, Single-Detector Check Valves for Fire Sprinkler Systems are used in fire protection applications to detect leakage or unauthorized use of water in fire sprinkler systems. It...
The Colt LFC300, LFC300N Double Check Detector Assemblies are used to prevent backflow of pollutants, that are objectionable but not toxic, from entering the potable water supply system. The Colt...
The LFN170 CSUT Lead Free* Master Tempering Valve Series is designed for use in commercial and institutional applications, to mix hot and cold water to reduce high service water temperature...
The Maxim LFM300, LFM300N Double Check Detector Assemblies are used to prevent backflow of pollutants, that are objectionable but not toxic, from entering the potable water supply system. The Maxim...
The N170 CSUT Master Tempering Valve Series is designed for use in commercial and institutional applications, to mix hot and cold water to reduce high service water temperature to the...
The Series 3000BM1 Double Check Detector Assembly (DCDA) is specifically designed to protect against possible backpressure and backsiphonage conditions for non-health hazard (i.e., pollutant) application in accordance with Local Governing...
The WATTS ACV Backpressure or Sustaining Control Valve with Hydraulic Check Feature is designed to permit flow when upstream pressure is above the adjustable setpoint of the control pilot, and...
The Watts ACV Combination Pressure Reducing and Check Valve is designed to automatically reduce a fluctuating higher upstream pressure to a constant lower downstream pressure, and close drip-tight when downstream...
The Watts ACV Models M400 and M1400 are full port, single chamber basic valves that incorporate a two-piece disc and diaphragm assembly. This assembly is the only moving part within...
The Watts ACV Models M518 and M1518 are full port, dual chamber basic valves that incorporate a two-piece telescoping disc and diaphragm assembly. This assembly is the only moving part...
The WATTS ACV Models M6400 and M61400 are reduced port, single chamber basic valves that incorporate a two-piece disc and diaphragm assembly. This assembly is the only moving part within...
The Watts ACV Models M6518 and M61518 are reduced port, dual chamber basic valves that incorporate a two-piece telescoping disc and diaphragm assembly. This assembly is the only moving part...
The Watts ACV Models S400 and S1400 are full port, single chamber basic valves that incorporate a two-piece telescoping disc and diaphragm assembly. This assembly is the only moving part...
The Watts ACV Models S518 and S1518 are full port, dual chamber basic valves that incorporate a two-piece telescoping disc and diaphragm assembly. This assembly is the only moving part...
The Watts ACV Models S6400 and S64000 are reduced port, single chamber basic valves that incorporate a two-piece disc and diaphragm assembly. This assembly is the only moving part within...
The Watts ACV Models S6518 and S61518 are reduced port, dual chamber basic valves that incorporate a two-piece telescoping disc and diaphragm assembly. This assembly is the only moving part...
The WATTS ACV Pressure Reducing and Check Valve is designed to automatically reduce a fluctuating higher upstream pressure to a constant lower downstream pressure regardless of varying flow rates, and...
The WATTS ACV Pressure Reducing and Sustaining Control Valve with Hydraulic Check Feature is designed to automatically reduce a fluctuating higher upstream pressure to a constant lower downstream pressure regardless...
The Watts ACV Pressure Sustaining and Solenoid (On-Off) Control Valve with Hydraulic Check Feature is designed to permit flow when upstream pressure is above the adjustable setpoint of the control...
The WATTS ACV Pump Control Valve is designed to minimize the surges associated with the starting and stopping of pumps. The valve opens at an adjustable rate upon pump start-up,...
The WATTS ACV Rate of Flow Control Valve with Hydraulic Check Feature is designed to automatically limit flow rate to a constant, adjustable, maximum, and close drip-tight when downstream pressure...
The WATTS ACV Solenoid Control Valve with High Capacity Pilot System and Hydraulic Check Feature is designed to open fully or close drip-tight as commanded by a 3-Way Solenoid Pilot,...
The WATTS ACV Solenoid Control Valve with Hydraulic Check Feature is designed to open fully or close drip-tight as commanded by a 3-Way Solenoid Pilot, and close drip-tight when downstream...