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 - Search For Spares - by Anthony West (UK). Following on from the aquisition of the old Fordson F, I was very much in need of spares. As a novice though I didn't appreciate the fact that there were so many Fordson tractors made, that all the other makes seem rare by comparison. As far as I was aware a fordson was a fordson and it was only through trial an
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