Watts Datasheets for Pressure Relief Valves
Pressure relief valves are self-actuated safety valves designed to relieve excess pressure upstream from the line.
Pressure Relief Valves: Learn more
| Product Name | Notes |
|---|---|
| Designed to automatically limit flow rate to a constant, adjustable, maximum by sensing differential pressure across a remote mounted orifice plate (field installed), and reduce a fluctuating higher upstream pressure... | |
| Designed to automatically reduce a fluctuating higher upstream pressure to a constant lower downstream pressure regardless of varying flow rate, and quickly modulate toward closed when sudden high pressure downstream... | |
| 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, and open for return flow when downstream pressure exceeds inlet... | |
| Designed to automatically reduce a fluctuating higher upstream pressure to a constant lower downstream pressure regardless of varying flow rates, and throttle to sustain a minimum upstream pressure. | |
| 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 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 quickly modulate... | |
| Designed to automatically reduce a fluctuating higher upstream pressure to a constant lower downstream pressure regardless of varying flow rates. Flow requirements below the range of the main line Pressure... | |
| Designed to automatically reduce a fluctuating higher upstream pressure to a constant lower downstream pressure regardless of varying flow rates. The valve also acts as a Solenoid (On-Off) Control Valve. | |
| Designed to automatically reduce a fluctuating higher upstream pressure to a constant lower downstream pressure regardless of varying flow rates. | |
| Designed to minimize the effects of water hammer and pressure surges resulting from: 1) Normal pump starting and stopping operations or 2) Mechanical or electrical power failure situations. The valve... | |
| Designed to minimize the surges associated with the starting and stopping of pumps, and automatically reduce pump outlet pressure to a constant lower downstream pressure regardless of varying flow rates. | |
| Designed to minimize the surges associated with the starting and stopping of well pumps, and open to relieve excessive pressure during the pumping cycle. The valve closes at an adjustable... | |
| 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. When installed "off the... | |
| Jumper Kits are used in new construction as a temporary by-pass, prior to the actual installation of a water pressure reducing valve on potable water supply systems. The use of... | |
| Lead Free* cast copper silicon alloy body safety relief valves for pressure protection only of all types of hot water heating boiler equipment. Pressure range 50 to 150psi (3 -... | |
| Model 6115-74JM Pressure Reducing Control Valve with Low-Flow By-Pass is constructed the same as 6115-JM with addition of a full 3/4 in. Low-Flow By-Pass, expanding the flow range. | |
| Model 6115-7JM Pressure Reducing and Downstream Surge Control Valve is constructed same as the 6115-JM with additional downstream surge control pilot. The added surge control pilot ensures positive pressure control... | |
| Model 6115-JM Pressure Reducing Control Valve is designed to reduce a higher, fluctuating inlet pressure to a constant, lower, outlet pressure. | |
| Model LF10L Temperature and Pressure Relief Valves are used in water heater and hot water storage tank applications to provide automatic temperature and pressure protection to hot water supply tanks... | |
| Series 100DT Drain Tubes for T&P Relief Valves are used on gas, electric, or oil fired residential water heaters to safely drain water discharged from the heater's temperature and pressure... | |
| Series 100DT-A60 Drain Tubes for T&P Relief Valves are used on gas, electric, or oil fired residential water heaters to safely drain water discharged from the heater's temperature and pressure... | |
| Series 100XL Temperature and Pressure Relief Valves are used in water heater and hot water storage tank applications to provide automatic temperature and pressure protection to hot water supply tanks... | |
| Series 140S, 140X Automatic Reseating Temperature and Pressure Relief Valves are used in commercial water heater applications to provide automatic temperature and pressure protection to domestic hot water supply tanks... | |
| Series 1450F Dual Controls (Regulator and Relief Valve) are for use in commercial and residential hydronic heating systems to fill the boiler and piping system with water, and to maintain... | |
| Series 174A Boiler Pressure Relief Valves are used in hot water heating and domestic supply boiler applications to protect against excessive pressures on all types of hot water heating supply... | |
| Series 1L, 1XL Temperature and Pressure Relief Valves are used in water heater and hot water storage tank applications to provide automatic temperature and pressure protection to hot water supply... | |
| Series 2300 Direct Operated Water Pressure Reducing Valves are used in commercial and industrial applications to regulate the flow of water to dead-end services where the flow is intermittent and... | |
| Series 315-M2 Steam Safety Relief Valves are used in commercial and industrial applications for low-pressure, steam heating boilers and process equipment. It consists of a bronze body construction with NPT... | |
| Series 340, 340X Automatic Reseating Temperature and Pressure Relief Valves are used in commercial water heater applications to provide automatic temperature and pressure protection to hot water supply tanks and... | |
| Series 342, 342X Automatic Reseating Temperature and Pressure Relief Valves are used in commercial water heater applications to provide automatic temperature and pressure protection to domestic hot water supply tanks... | |
| Series 374A Boiler Pressure Relief Valves are used in hot water boiler applications to protect against excessive pressure on all types of hot water heating boiler equipment. It consists of... | |
| Series 3L Pressure Relief Valves are used in residential applications to protect against excessive pressure on domestic storage tanks, tankless water heaters, and solar heating applications. It consists of a... | |
| Series 40L, 40XL Automatic Reseating Temperature and Pressure Relief Valves are used in commercial water heater applications to provide automatic temperature and pressure protection to hot water supply tanks and... | |
| Series 415 Steam Safety Relief Valves are used in commercial and industrial applications for low-pressure, steam heating boilers and process equipment. It consists of a brass body (size 1/4 in.),... | |
| Series 53 Pressure Relief Valves are used in residential applications to protect against excessive pressure on domestic storage tanks and tankless water heaters. It consists of a bronze body construction... | |
| Series 5300A By-Pass Control Relief Valves are used in commercial, residential and industrial applications to regulate liquid pressure as supplied by a positive pressure pump. It is a poppet-type compact... | |
| Series 530C Calibrated Pressure Relief Valves are used in commercial, residential and industrial applications to protect against excessive pressure in systems containing water, oil, or air. It consists of a... | |
| Series 53L Pressure Relief Valves are used in residential applications to protect against excessive pressure on domestic storage tanks and tankless water heaters. It consists of a bronze body construction... | |
| Series 740 Boiler Pressure Relief Valves are used in hot water space heating boiler applications to protect against excessive pressure on all types of hot water space heating boiler equipment. | |
| Series 8FR Hose Connection Vacuum Breakers permit the attachment of portable hoses to hose thread faucets and prevent the reverse flow of polluted water from entering into the potable water... | |
| Series BP30 By-Pass Control Relief Valves are used in commercial, residential and industrial applications to regulate liquid pressure as supplied by a positive pressure pump. It is a diaphragm-operated type... | |
| Series Figure 31 Steam Safety Relief Valves are ASME section I valves used on steam boilers with operating pressures from 5 to 250psi (.34 to 17.2 bar). Series Figure 31... | |
| Series Figure 41 Steam Safety Relief Valves are ASME section VIII valves used for over-pressure protection of unfired pressure vessels, steam pressure reducing valve stations, and other steam service equipment... | |
| Series Figure 41A Safety Relief Valves for Air, Gas, and Vapors are ASME section VIII valves used for compressors, intercoolers, aftercoolers and receivers, air makeup units, gas burners, pneumatic conveying/elevating... | |
| Series FP53L Pressure Relief Valves for Fire Protection Applications are designed for use in fire protection grid systems to provide protection against excessive water pressure caused by thermal expansion or... | |
| Series LF100XL Temperature and Pressure Relief Valves are used in water heater and hot water storage tank applications to provide automatic temperature and pressure protection to hot water supply tanks... | |
| Series LF123LP Water Pressure Reducing Valves are designed to reduce incoming water pressure to a sensible level to protect plumbing system components and reduce water consumption. This series is suitable... | |
| Series LF127W High Capacity Water Pressure Reducing Valves are used in commercial and industrial applications to reduce incoming water pressure for protection of plumbing system components and to reduce water... | |
| Series LF140L Automatic Reseating Temperature and Pressure Relief Valves are used in commercial water heater applications to provide automatic temperature and pressure protection to hot water supply tanks and hot... | |
| Series LF1L, LF1XL Temperature and Pressure Relief Valves are used in water heater and hot water storage tank applications to provide automatic temperature and pressure protection to hot water supply... | |
| Series LF223, LF223S Lead Free* High Capacity Water Pressure Reducing Valves are used in commercial, industrial, and institutional applications to reduce incoming water pressure for protection of plumbing system components... | |
| Series LF25AUB-Z3 Lead Free* Water Pressure Reducing Valves are used in commercial and residential applications to reduce incoming water pressure for protection of plumbing system components and to reduce water... | |
| Series LF340, LF340X Automatic Reseating Temperature and Pressure Relief Valves are used in commercial water heater applications to provide automatic temperature and pressure protection to hot water supply tanks and... | |
| Series LF3L and LF53L are used for protection against excessive pressure on domestic storage tanks or tankless water heaters. Similar in construction to Watts Model LF10L, the Model LF3L has... | |
| Series LF40L, LF40XL Automatic Reseating Temperature and Pressure Relief Valves are used in commercial water heater applications to provide automatic temperature and pressure protection to hot water supply tanks and... | |
| Series LF4L is used to protect against excessive pressure in tankless water heaters. Similar in construction to Watts Model LF3L, the LF4L has no temperature relieving element. Series LF4L is... | |
| Series LF53 Lead Free* ressure Relief Valves are spring operated Lead Free* brass relief valves designed to be used only as protection from the build up of excessive pressure in... | |
| Series LF530C Lead Free* Calibrated Pressure Relief Valves are used in commercial, residential and industrial applications to protect against excessive pressure in systems containing water, oil, or air. It consists... | |
| Series LFB6080G2, LFB6081G2 2-Piece, Full Port, Lead Free* bronze Ball Valves are used in commercial and industrial applications for a full range of liquids and gasses. They feature a blowout... | |
| Series LFBP30 Lead Free* Diaphragm Operated Bypass Relief Valves regulate liquid pressure as supplied by a positive pressure pump. These relief valves protect equipment by opening at desired setting and... | |
| Series LFBRVM1, Combination Ball Valve and Relief Valve is an easy to install two-in-one device. Designed to be used as water heater shutoff valves to provide both a means to... | |
| Series LFF127W Flanged High Capacity Water Pressure Reducing Valves are used in commercial and industrial applications to reduce incoming water pressure for protection of plumbing system components and to reduce... | |
| Series LFLL40XL, LFLLL40XL Extended Shank Automatic Reseating Temperature and Pressure Relief Valves are used in commercial water heater applications to provide automatic temperature and pressure protection to hot water supply... | |
| Series LFN223B, LFN223BS Lead Free* High Capacity Water Pressure Reducing Valves are used in commercial, industrial, and institutional applications to reduce incoming water pressure for protection of plumbing system components... | |
| Series LFN223F and LFN223FS Super Capacity Water Pressure Reducing Valves are designed to reduce incoming water pressure to a sensible level to protect plumbing system components and reduce water consumption. | |
| Series LFN240X Automatic Reseating Temperature and Pressure Relief Valves are used in commercial water heater applications to provide automatic temperature and pressure protection to hot water supply tanks and hot... | |
| Series LFN250 Iron Body Water Pressure Reducing Valves are designed to reduce incoming water pressure to a sensible level to protect plumbing system components and reduce water consumption. This series... | |
| Series LFN36 Lead Free* Water Service Vacuum Relief Valves are used in water heater/tank applications to automatically allow air to enter into the piping system to prevent vacuum conditions that... | |
| Series LFN45B Lead Free* Water Pressure Reducing Valves are used in commercial and residential applications to reduce incoming water pressure for protection of plumbing system components and to reduce water... | |
| Series LFN45B-EZ Water Pressure Reducing Valves are designed to reduce incoming water pressure to a sensible level to protect plumbing system components and reduce water consumption. This series is suitable... | |
| Series LFN55B Lead Free* Water Pressure Reducing Valves are used in commercial and residential applications to reduce incoming water pressure for protection of plumbing system components and to reduce water... | |
| Series LFN55B Water Pressure Reducing Valves are used in commercial and residential applications to reduce incoming water pressure for protection of plumbing system components and to reduce water consumption. It... | |
| Series LFRC105 Water Pressure Reducing Valves are designed to reduce incoming water pressure to a sensible level to protect plumbing system components and reduce water consumption. The LFRC105 features Lead... | |
| Series LFU5B-Z3 Lead Free* High Performance Water Pressure Reducing Valves are used in commercial, industrial, and residential applications to reduce incoming water pressure for protection of plumbing system components and... | |
| Series LFX65B Lead Free* Water Pressure Reducing Valves are designed to reduce incoming water pressure to a sensible level to protect plumbing system components and reduce water consumption. The LFX65B... | |
| Series LL40XL, LLL40XL Extended Shank Automatic Reseating Temperature and Pressure Relief Valves are used in commercial water heater applications to provide automatic temperature and pressure protection to hot water supply... | |
| Series N240X, N241X Automatic Reseating Temperature and Pressure Relief Valves are used in commercial water heater applications to provide automatic temperature and pressure protection to domestic hot water supply tanks... | |
| Series N30 Pressure Relief Valves for Wells are used to protect against excessive pressures in well systems. It is not diaphragm actuated and is used for pressure-relief service only. Series... | |
| Series N36 Water Service Vacuum Relief Valves are used in water heater/tank applications to automatically allow air to enter into the piping system to prevent vacuum conditions that could siphon... | |
| Series SL100XL, L100XL, LL100XL and LLL100XL Extended Shank Temperature and Pressure Relief Valves are used in water heater and hot water storage tank applications to provide automatic temperature and pressure... | |
| The Ames 910GF (Globe) and 910AF (Angle) Pressure Reducing Valves meet all requirements for UL listed fire protection service. Automatically reduces a higher inlet pressure to an adjustable lower outlet... | |
| The Ames ACV 920A-UL (Angle) Relief Valve meets all requirements for UL listed, FM Approved fire protection service. The design and features incorporated in the Ames ACV valves assure accurate... | |
| The Ames ACV 920GF (Globe) and 920AF (Angle) Relief Valve meets all requirements for UL listed, FM Approved fire protection service. The design and features incorporated in the Ames ACV... | |
| The Model 263RS is a remote sensed, direct acting, diaphragm actuated Pilot that is used on various configurations of Automatic Control Valves. It is normally held open by the force... | |
| The Model 263SS is a direct acting, diaphragm actuated Pilot that automatically reduces a higher upstream (inlet) pressure to a constant downstream (outlet) pressure. It is normally held open by... | |
| The Model CP15-1SS is a remote sensed, direct acting, diaphragm actuated Pilot that is used on various configurations of Automatic Control Valves. It is normally held open by the force... | |
| The Model CP15SS is a direct acting, diaphragm actuated Pilot that automatically reduces a higher upstream (inlet) pressure to a constant downstream (outlet) pressure. It is normally held open by... | |
| The Model LF263AP is a direct acting, diaphragm actuated control pilot that automatically reduces a higher upstream (inlet) pressure to a constant downstream (outlet) pressure. It is normally held open... | |
| The Model LFCP-15 is a direct acting, diaphragm actuated Pilot that automatically reduces a higher upstream (inlet) pressure to a constant downstream (outlet) pressure. It is normally held open by... | |
| The Model LFPV20C is a remote sensed direct acting, diaphragm actuated Pilot that is used on various configurations of Automatic Control Valves. It is normally held closed by the force... | |
| The Model LFPV20CB is a direct sensed direct acting, diaphragm actuated Pressure Relief pilot. It is normally held closed by the force of the adjustable spring setting above the diaphragm. | |
| The Model SSPV20C is a remote sensed direct acting, diaphragm actuated Pilot that is used on various configurations of Automatic Control Valves. It is normally held closed by the force... | |
| The Model SSPV20DP is a remote sensed, diaphragm actuated Pilot that is used for maintaining a constant differential. It is normally held closed by the force of the adjustable spring... | |
| The WATTS ACV 116FM (Globe) Relief Valve meets all requirements for UL listed, FM Approved fire protection service. The design and features incorporated in the WATTS ACV Valves assure accurate... | |
| 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 Combination Pressure Reducing and Surge Control Valve is designed to automatically reduce a fluctuating higher upstream pressure to a constant lower downstream pressure, and will quickly modulate... | |
| The WATTS ACV Combination Surge Anticipator and Pressure Relief Control Valve is designed to minimize the effects of water hammer and pressure surges resulting from: 1) Normal pump starting and... | |
| The Watts ACV Deep Well Pump Control Valve with Pressure Relief Feature is designed to minimize the surges associated with the starting and stopping of well pumps, and open, relieving... | |
| 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 Downstream Surge Control Valve is designed to automatically reduce a fluctuating higher upstream pressure to a constant lower downstream pressure regardless of varying flow... | |
| The WATTS ACV Pressure Reducing and Solenoid (On-Off) Control Valve is designed to automatically reduce a fluctuating higher upstream pressure to a constant lower downstream pressure regardless of varying flow... | |
| The WATTS ACV Pressure Reducing and Sustaining Control Valve is designed to automatically reduce a fluctuating higher upstream pressure to a constant lower downstream pressure regardless of varying flow rates,... | |
| The WATTS ACV Pressure Reducing and Sustaining Control Valve with Downstream Surge Control Feature is designed to automatically reduce a fluctuating higher upstream pressure to a constant lower downstream pressure... | |
| 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 Reducing Control Valve is designed to automatically reduce a fluctuating higher upstream pressure to a constant lower downstream pressure regardless of varying flow rates. | |
| The WATTS ACV Pressure Reducing Control Valve with Low Flow By-Pass is designed to automatically reduce a fluctuating higher upstream pressure to a constant lower downstream pressure regardless of varying... | |
| The WATTS ACV Pressure Reducing Control Valve with Return Flow Feature is designed to automatically reduce a fluctuating higher upstream pressure to a constant lower downstream pressure regardless of varying... | |
| The WATTS ACV Pressure Relief, Sustaining or Backpressure Control Valve is designed to permit flow when upstream pressure is above the adjustable setpoint of the control pilot, and throttle toward... | |
| The WATTS ACV Pump Control Valve with Pressure Reducing Feature is designed to minimize the surges associated with the starting and stopping of pumps, and automatically reduce pump outlet pressure... | |
| The WATTS ACV Rate of Flow Control Valve with Pressure Reducing Feature is designed to automatically limit flow rate to a constant, adjustable, maximum, and reduce a fluctuating higher upstream... | |
| The Watts M115F (Globe) and M1115F (Angle) Pressure Reducing Valves meet all requirements for UL listed fire protection service. Automatically reduces a higher inlet pressure to an adjustable lower outlet... | |
| The WATTS M116FM (Globe) and M1116FM (Angle) Relief Valve meets all requirements for UL listed, FM Approved fire protection service. Automatically maintains a constant pressure in the fire protection system... |