Two things: 1 - Temperature Pressure Relief valves (TPR Valves) do corrode and do leak priodically and replacement is a trip to the plumbing supply house and a 15 minute job to replace the relief valve. 2 - The normal ratings for PRV's are 190-200 degress temperature and 150 psi pressure. If the service line pressure is over 120 psi or so, any slight variation in pressure such as the hydraulic pressure in turning off a faucet will open the valve and it will continue to drip. If the line pressure is high you should install a pressure regulator valve in the service line and reduce the overall house presssure to 40-60 psi. The rest of the valves in the house will appreciate the lowered pressure. By all means, replace the valve. I have personally had stuck or corroded TPR valves along with a stuck thermostat that backed up hot water in the cold water line three doors down the street. I have also seen movies of houses blown to bits by an exploding water heater....
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Today's Featured Article - An Old-Time Tractor Demonstration - by Kim Pratt. Sam was born in rural Kansas in 1926. His dad was a hard-working farmer and the children worked hard everyday to help ends meet. In the rural area he grew up in, the highlight of the week was Saturday when many people took a break from their work to go to town. It was on one such Saturday in the early 1940's when Sam was 16 years old that he ended up in Dennison, Kansas to watch a demonstration of a new tractor being put on by a local dealer. It was an Allis-Chalmers tractor dealership,
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