Drain the Water Heater for Winter

January 6th, 2010 by admin Leave a reply »

Question:

When I drain my electric water heater for the winter, does all the water come out, or is there still some at the bottom? If so, is it ok if it freezes?

Tim

Answer:

A little water will remain in the water heater, which is fine. It may freeze, but will not cause a problem.

Freezing water is a problem because of the pressure it creates when the water expands as it freezes. If the freezing water is in a sealed system or pipe, it will burst the pipe or push open the joints.

The water heater is not sealed so there should be no problem. I would leave the drain valve open over the winter.

Tom

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