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relief valve

Posted by John Olthuis on June 4th, 1998 03:40 PM
In reply to Pressure relief valve by Henry in MI on June 4th, 1998 10:39 AM [Go to top of thread]

Henry is right in his recommendations. Be careful with your water heater.
The first thing you should check is the water temperature. Go to the faucet closest to your hot water heater. (Laundry tub?) run the water for about 2 minutes until you see steam. Using a meat thermometer check the temperature. In Canada, the CSA standard is 140 degrees. Too hot if you have young children. 122 is better and more energy efficient.
If the water temperature is ok, the water coming out of your preasure relief valve (PRV) may be simply caused by lime particles caught in the seat of the valve.
Try to clear the particles.
You should have a plastic or copper pipe directing the water flow down from the valve. Put on rubber gloves, rain coat or thick jacket and goggles and get a pale and place the pale under the PRV outlet. pull up the silver metal tab and let the water stream out. Watch out for spalshes as the water will be very hot. It may take two or three times to clear but this should work. If not you will have to replace the valve. any plumbing supply place or Home Depot will have them. they are about $3-5 US to replace.

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