Description
Lochinvar & A.O. Smith 100277954 — 3/4″ 150# Temperature & Pressure Relief Valve
The Lochinvar & A.O. Smith 100277954 is a 3/4-inch, 150 PSI-rated Temperature and Pressure (T&P) Relief Valve engineered to provide critical overpressure and overtemperature protection for water heaters and hydronic heating systems. Designed as a genuine OEM replacement part, this valve ensures your system operates safely within its designed pressure and temperature limits, protecting equipment and occupants from the hazards of runaway pressure buildup.
Key Features
- Genuine Lochinvar & A.O. Smith OEM replacement part
- 3/4″ connection size for straightforward installation on compatible water heaters
- 150 PSI pressure rating provides reliable overpressure relief
- Temperature and pressure (T&P) dual-function protection
- Designed to automatically discharge when system pressure or temperature exceeds safe operating limits
- Durable construction built to meet the demands of residential and light commercial water heating applications
Application
This T&P relief valve is a direct OEM replacement for Lochinvar and A.O. Smith water heaters and boilers requiring a 3/4″ 150# rated valve. It is an essential safety component that must be maintained in proper working order to comply with plumbing and mechanical codes. Always consult your equipment’s installation manual to confirm compatibility before installation.
Specifications
- SKU: 100277954
- Brand: Lochinvar & A.O. Smith
- Connection Size: 3/4″
- Pressure Rating: 150 PSI
- Valve Type: Temperature & Pressure (T&P) Relief Valve







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