3/4" Temperature and Pressure Relief Valve, Male x Female

Watts 3/4" Lead-Free T&P Relief Valve – Critical Protection for Hot Water Systems

The Watts 3/4" Lead-Free Temperature and Pressure Relief Valve is engineered to safeguard water heaters and hot water storage tanks from the hazards of excessive pressure and temperature. Designed for use in commercial and residential installations, this ASME-rated valve is a vital component in any code-compliant hot water system.

Manufactured from lead-free bronze and equipped with an advanced thermostat featuring a thermo-bonded coating, this relief valve provides accurate thermal sensing and dependable reseating. It offers consistent operation under high-demand conditions and helps ensure system integrity and user safety.

Product Highlights

• Lead-Free Certified: Constructed from NSF 372-compliant materials for potable water applications.
• Automatic Relief: Opens when temperature exceeds 210°F or system pressure surpasses factory-set limits (typically 150 psi).
• Bronze Body Construction: Withstands thermal stress and corrosion over long service cycles.
• Thermo-Bonded Thermostat: Improves thermal sensitivity and operational reliability.
• Extended Shank Models Available: Accommodates modern tank insulation requirements (if applicable).

Specifications

• Inlet Size: 3/4" NPT
• Outlet Size: 3/4" NPT
• Set Temperature: 210°F (99°C)
• Pressure Ratings: Available settings at 75, 100, 125, or 150 psi (standard is 150 psi)
• Body Material: Lead-free bronze
• Listings: ASME Section IV, CSA B125.1

Installation Notes

Install in the designated T&P port of the water heater or tank, ensuring the temperature-sensing element extends directly into the heated water. The discharge piping must comply with applicable plumbing codes—terminate at a safe location and never cap the outlet. Professional installation is strongly advised to ensure proper orientation, thread seal application, and compliance with code requirements.

Applications

• Water heaters (gas, electric, indirect)
• Hot water storage tanks
• Booster heater systems

Contractor Advantages

This valve is built for installers who need reliability on every job. With proven thermal response, corrosion-resistant construction, and compatibility with common tank fittings, it helps reduce callbacks and supports long-term system protection. The included test lever allows for onsite function verification without removal or disassembly.

Compliance & Assurance

• Certified lead-free for potable systems
• Conforms to ANSI Z21.22 and CSA 4.4
• Manufactured under ISO 9001 quality assurance standards

Summary

Protecting your customers' water heating systems starts with code-compliant components. The Watts 3/4" Lead-Free T&P Relief Valve delivers the safety, performance, and durability trusted by contractors nationwide. For installations that demand dependable protection from overpressure and overheating, this is the valve of choice.