![]() This pressure relief valve is located "remote" from the water heater tank itself, on the hot water supply pipe. ![]() ![]() Watch out: The safety device shown in this photo responds only to over-pressure, not to excessive temperature in the water heater This installation has two innate safety hazards: Here we illustrate a "pressure-only" type relief valve installed on an older gas-fired residential water heater. Pressure-Only Water Heater Relief Valves & Safety Devices We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. We explain the function, inspection, and maintenance of temperature & pressure relief valves on water heaters used to produce hot water for washing and bathing. This article series explains temperature and pressure relief valves used on residential water heaters. When are pressure only relief valves safe on water heating equipment? Ever? What about water heater safety valves and companion safety devices on small electric point of use water heaters? We have no relationship with advertisers, products, or services discussed at this website. InspectAPedia tolerates no conflicts of interest.
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