Boiler Valves | McMaster-Carr

	Inlet Pipe Size Inlet Pipe Size

	For Use With For Use With

	Body Material Body Material

	Relief Port Pipe Size Relief Port Pipe Size

	Valve Function Valve Function

Pressure Relief

Flow Adjustment

On/Off

	Inlet Gender Inlet Gender

Male

Female

	Shape Shape


45° Elbow	70° Elbow

90° Elbow	Straight

	Pipe Size Pipe Size

	Maximum Temperature Maximum Temperature

	Maximum Inlet Pressure Maximum Inlet Pressure

	Inlet Connection Type Inlet Connection Type


Pipe	Tube

	Valve Type Valve Type

	Seal Material Seal Material

Rubber

Stainless Steel

Brass

	Overall Height Overall Height

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Minimum Temperature Minimum Temperature

	Set Pressure Set Pressure

	Inlet Connection Style Inlet Connection Style

Threaded

Solder Connect

	Relief Port Connection Type Relief Port Connection Type

Pipe

Vent

	Activation Activation

Pressure Driven

Temperature Driven

	Thread Type Thread Type

NPT

GHT

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

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110 Products

About Pressure-Relief Valves

Threaded Flow-Adjustment
Valves with Garden Hose Outlet

Attach garden hose to the valve outlet. Use with water. These valves gradually open and close to adjust and regulate flow.

Plastic Threaded Flow-Adjustment
Valves with Garden Hose Outlet

For lightweight and corrosion-resistant alternative to metal, these valves are plastic. Attach garden hose to the valve outlet. Use with water. These valves gradually open and close to adjust and regulate flow.

Low-Pressure Threaded Flow-Adjustment Valves

Use these valves for boiler maintenance and other low-pressure plumbing applications. They're for use with water. All gradually open and close to adjust and regulate flow.

Threaded Gradual On/Off Valves for Boiler Blow-Off

Prevent boiler scale deposits and sediment buildup with these valves designed to meet ASME standards for boiler drainage applications.

Pressure and Vacuum Control Valves

ASME-Code Fast-Acting
Pressure-Relief Valves for Hot Water

Protect your water-heating system with these valves that meet ASME Code Section IV for hot water heaters and boilers.

ASME-Code Fast-Acting
Pressure-Relief Valves for Water

These valves meet ASME Code Section VIII for use with water pressure vessels.

Fast-Acting Temperature- and
Pressure-Relief Valves for Hot Water

Also known as T & P valves, these open when water temperature reaches 210° F or at the set pressure.

ASME-Code Fast-Acting Pressure-Relief
Valves for Low-Pressure Steam

For use with low-pressure steam-heating boilers requiring pressure relief at 15 psi, these valves meet ASME Code Section IV.

ASME-Code Fast-Acting
Pressure-Relief Valves for Steam

These valves meet ASME Code Section I for use with steam power boilers requiring pressure relief above 15 psi.

Fast-Acting Pressure-Relief Valves
for Ultra-Low-Pressure Steam

Choose these valves for small steam-heating boilers requiring pressure relief between 5 psi and 12 psi.

Fast-Acting Pressure-Relief Valves for Air and Inert Gas

The most basic option for air and inert gas applications.

Heat-Activated Threaded Pressure-Relief Discs

Also known as fusible plugs, these discs have a metal core that melts at a set temperature to exhaust discharge directly.

Plumbing Fixtures and Drains

On/Off Faucets with Garden Hose Outlet

These faucets turn on and off with a quarter turn of the handle.

Single-Inlet Sink Faucets