Posted by Andy R on December 25, 2020 at 17:17:34 from (208.126.193.44):
I have a water heater that is leak free and has a new top thermostat/maximum temperature cutout. Problem is that the pressure/temperature relief valve is opening and has been dumping off and on over the past three weeks. Opened early in the week and today at least. Top element is set at 125 degree F. Bottom element is set between B and C on a A/B/C/D scale. Water comes out of the kitchen faucet at about 125 degrees F. This is at a farm house I rent to a young couple. Can the temperature/pressure relief valve go bad? Never had the problem before. Since the water heater is probably 10 years old and the well produces hard water do you think I would actually be able to unscrew the relief? Looks like a pipe might screw into the tank. The breaker opened today as well, but that might be due to water splashing into the wiring/elements. Renter has the element covers off. Those will go back on tomorrow. The plumber that installed the water heater didn't extend the relief valve to the floor. That will be fixed tomorrow also. Fortunately the water heater is in the basement near a floor drain. Are there other issues that can cause the relief to open either due to heat or pressure?
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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