Watts 3/4 in. MNPT Brass Temperature and Pressure Relief Valve provides dependable protection for your water heating system by venting excess pressure or temperature before dangerous conditions can develop. This non-adjustable valve is built for durability in demanding residential settings and uses standard 3/4" MNPT to 3/4" FNPT connections for straightforward installation.
Key features and specs
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Brass body: enduring, corrosion-resistant construction designed for long service life.
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Inlet/outlet configuration: 3/4" MNPT (in) to 3/4" FNPT (out) for broad compatibility with common piping setups.
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Non-adjustable, factory preset: reliable relief thresholds so you don’t have to dial in settings.
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Ratings: maximum 150 psi and 210°F, suitable for typical residential water heaters and boilers.
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Lead-free construction: compliant with safety standards for potable water systems.
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Packaging: boxed for protection during storage and shipment.
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Single unit: includes one valve per package.
Why this Watts valve stands out
This Watts valve pairs durable brass with a simple, reliable 3/4" NPT interface, making replacement and installation straightforward. The lead-free brass body resists mineral buildup and corrosion, helping maintain safety performance over time. Its non-adjustable design ensures consistent relief behavior across installations, reducing the risk of improper settings and leakage.
Ideal use cases
- Residential water heaters that require dependable temperature and pressure protection.
- Boilers and hydronic heating systems needing a trusted T&P safety valve.
- Valve replacement projects to restore proven safety performance in aging systems.
Installation and maintenance tips
Ensure you have compatible 3/4" MNPT inlet and 3/4" FNPT outlet connections. Apply plumbing-grade thread sealant rated for potable water to male threads and tighten using standard piping practices to prevent leaks. Direct the discharge line to a safe location away from people and property, and keep it free of obstructions for full relief. Regularly inspect the valve for signs of leakage, corrosion, or mineral buildup, and replace it if any issues arise. Adhere to local codes and follow manufacturer guidelines when integrating this valve into your system.
