Best Brass Relief Valves in 2026

1/4" NPT 165 PSI Industrial air compressor / tank pressure safety relief valve.

Also known as a "Pop Off" or "Blow Off" valve.

This relief valve is manufactured in the United States and is stamped with "UV" & "NB" symbols.

CASH ACME RELIEF VALVE: Cash Acme NCLX Combination Temperature and Pressure Relief Valves are designed for the protection of water heaters and storage tanks; incorporate an inert thermal element coating that provides effective isolation from mineral deposits (liming) and galvanic corrosion

DESIGN: The NCLX Series relief valves feature a cast bronze body, brass, and stainless steel internal parts, silicone seat disc, and stainless steel pressure spring

COMPACT: Pressure-reducing and regulating valves

Relief pressure preset to 125 psi with flow rate of 116 cfm

1/4" male NPT threaded inlet connection

Brass construction and stainless steel spring for corrosion resistance

Relief pressure preset to 225 psi with flow rate of 199 cfm

1/4 NPT threaded inlet connection with Vibra-Seal thread lock

Brass construction and music wire spring for corrosion resistance

Pressure relief valves are for protection against excessive pressure

3/4 in. male NPT x 1/2 in. female FPT

Lead free brass with stainless steel control springs

Relief pressure preset to 60 psi with flow rate of 61 cfm

1/4" male NPT threaded inlet connection

Brass construction and stainless steel spring for corrosion resistance

Relief pressure adjustable from 0 to 100 psi

1/4" male NPT threaded inlet connection

Brass construction and stainless steel spring for corrosion resistance

DESIGN: The NCLX Series relief valves feature a cast bronze body, brass, and stainless steel internal parts, silicone seat disc, and stainless steel pressure spring

BRONZE BODY: Lead-free and superior reliability

COMPACT: Pressure reducing and regulating valves

Relief pressure pre-set to 250 psi with flow rate of 220 cfm

1/4 NPT threaded inlet connection with Vibra-Seal thread lock

Brass construction and music wire spring for corrosion resistance

Guards against excessive pressure in water, oil or air systems used in commercial, residential or industrial applications, including fire protection systems

All-brass construction features an NPT threaded male inlet and NPT threaded female (drain) outlet connections; a stainless-steel spring; a brass bonnet; a Buna-N disc and a Buna-N O-ring

Calibrated adjustment feature sets valve to the required relief pressure

Relief pressure preset to 150 psi with flow rate of 136 cfm

3/8 NPT threaded inlet connection with Vibra-Seal thread lock

Brass construction and music wire spring for corrosion resistance

Pressure relief valves are for protection against excessive pressure

1/2 in. male NPT x 1/2 in. female FPT

Lead free brass with stainless steel control springs

Pressure relief valves are for protection against excessive pressure

1/2 in. male NPT x 1/2 in. female FPT

Lead free brass with stainless steel control springs

247Garden CO2 Regulator w/Solenoid Valve 110V, Forged Brass Body, Nylon Washer, 4000 PSI Pressure Gauge, 0.5-15 SCFH Compatiable for Indoor Gardening & Hydroponics, Beer & Wine Kegs Brewing

Forged brass body and bonnet for maximum strength with 4000 PSI pressure gauge.

Safety relief valve is set for safe operation

Relief pressure pre-set to 225 psi with flow rate of 199 cfm

3/8 NPT threaded inlet connection with Vibra-Seal thread lock

Brass construction and music wire spring for corrosion resistance

This Brass Safety Valve Is Preset At 110 PSI And Has a Flow Rate (SCFM) Of 100

This Safety Valve Is Made In The USA

This Safety Valve Has An Operating Temperature Range of -65 Degrees Fahrenheit To 400 Degrees Fahrenheit

Pressure relief valves are for protection against excessive pressure

Lead free brass with stainless steel control springs

3/4" Line Connection, 100 PSI

DESIGN: The FVX Series combination temperature and pressure relief valves are designed to offer high capacity protection for domestic and commercial water heating devices

BRONZE BODY: Lead-free and superior reliability

COMPACT: Pressure reducing and regulating valves

<b>Price For:</b> Each <b>Inlet Type</b>: MNPT <b>Temp. Range</b>: 0 Degrees to 180 Degrees F <b>Outlet Size</b>: 1/2" <b>Spring Material</b>: Stainless Steel <b>Overall Height</b>: 3" <b>Disc Material</b>: Buna-N <b>Application</b>: Fire Protection Systems <b>Pressure Range</b>: 50 to 175 psi <b>Overall Length</b>: 1-5/8" <b>Body Material</b>: Brass <b>Standards</b>: ANSI Z21.22 <b>Outlet Type</b>: FNPT <b>Test Lever</b>: No <b>Factory Set Pressure</b>: 175 psi

<b>Inlet Size</b>: 3/4" <b>Seat Material</b>: Buna-N <b>Item</b>: Calibrated Adjustable Relief Valve <b>Item</b>: Calibrated Adjustable Relief Valve <b>Pressure Range</b>: 50 to 175 psi <b>Standards</b>: ANSI Z21.22 <b>Country of Origin (subject to change)</b>: United States

HIGH PRESSURE RESISTANCE: This pressure reducer can withstand pressure of 1.6Mpa , suit for many situation, can be widely used.

NO BYPASS PIPE NEEDED: No bypass pipe required, and the distribution pipe is simple, which can save a lot of space and distribution cost.

WIDE APPLICATIONS: This relief valve can be installed in front of most tap water equipment, can be used for home, buildings, factories, widely used.

1/8" BRASS SAFETY RELIEF VALVE FOR COMPRESSED AIR SYSTEMS, 75 PSI AND 37 CFM

ALSO KNOWN AS A "BLOW OFF" OR "POP OFF" VALVE

THIS VALVE IS MADE IN THE USA AND IS STAMPED WITH "UV" AND "NB" SYMBOLS

Preset at 150 PSI And Has a Flow Rate (SCFM) Of 129

This Safety Valve Is Made In The USA

This Safety Valve Has An Operating Temperature Range of -65 Degrees Fahrenheit To 400 Degrees Fahrenheit

Made from high quality H90 brass, this brass ball valve is robust and durable. In this respect, it is the ideal plug valve for high quality shut-off valves in the chemical and food industry or in the home or garden. The sides of the dispenser have female threads in accordance with ISO 7-1 (EN 10226-1) M-M

The internal passage of the drain tap is straight for optimum and complete passage and therefore has a low flow resistance. The permissible operating temperature is -25°C + 180°C and the maximum working pressure is 40 bar

The lever handle mounted on the top is used to close and open the ball valve, easy to use, pressure free or no pressure. The spherical seal is made of PTFE for maximum stability and durability even at very high temperatures

Made from high quality H90 brass, this brass ball valve is robust and durable. In this respect, it is the ideal plug valve for high quality shut-off valves in the chemical and food industry or in the home or garden. The sides of the dispenser have female threads in accordance with ISO 7-1 (EN 10226-1) M-M.

The internal passage of the drain tap is straight for optimum and complete passage and therefore has a low flow resistance. The permissible operating temperature is -25°C + 180°C and the maximum working pressure is 40 bar

The lever handle mounted on the top is used to close and open the ball valve, easy to use, pressure free or no pressure. The spherical seal is made of PTFE for maximum stability and durability even at very high temperatures.