Reply To: fourth water heater in as many years!

The Tank fourth water heater in as many years! Reply To: fourth water heater in as many years!

#19922
Randy Schuyler
Keymaster

To pressure-test, read this Tanklet: http://www.waterheaterrescue.com/pages/WHRpages/English/Troubleshooting/Tanklets/thermal-expansion-TP.html

Pressure shouldn’t be greater than 80 psi at any time. As to expansion tanks, they need to be charged to line pressure to work properly. They come pre-charged to 40 psi, but if line pressure is higher than that, they need to be pumped up.

Also, the rubber diaphragm inside them can fail with time, especially if the tank is mounted above the heater in such way that hot water flows up into it. Mounted elsewhere, cold water will flow in.

Randy Schuyler

Water Heater Rescue

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