Water Heater Temperature Pressure Relief Piping

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This water heater is an example of an important safety issue that homeowners and home buyers should check out. This home in Lakewood Colorado has an almost new hot water heater with a major defect in the installation. It was discovered during a recent home inspection. The tank wall section pictured shows the TPR valve (Temperature Pressure Relief Valve) which is required on all gas or electric hot water heaters. These valves will allow the hot water to release and escape from the tank at approximately 160 pounds per square inch of pressure ensuring the tank will not explode in the event of a malfunction in the heating and storage process. Attached to each TPR valve should be a 3/4 inch (usually copper) pipe which directs any pressurized water to the floor. The pipe should terminate approximately 6 inches from the floor like the one in the second picture. This prevents hot pressurized water from spraying outward from he unit and possibly scalding people or pets who might be in an area adjacent to the tank or damaging property.OLYMPUS DIGITAL CAMERA