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Txsurfer
Explorer
Jun 13, 2016

How do you know if your water heater is full?

Ok - so I have read never turn on the 110 heater coil in your water heater unless it has water in it - how do you know if its full or not?
  • If you turn on the hot water faucet, and water comes out instead of air. If in doubt, carefully open the safety valve and see if water comes out.
  • Turn on the hot water side of a faucet, when you get a steady stream of water with no burping or belching of air, you know it's full. I run ALL the faucets (hot side) for a bit just to be sure.

    Also, make sure you're not in bypass mode.