Quote:
Originally Posted by photo1902
I've had good luck flushing tanks using the drain valve. Leave the water on while opening and closing the drain valve shut-off. The water pressure helps blow out and break up the deposits. And when testing the TPR valve, or opening it to help the water drain from the tank, give the TPR a couple of taps with wrench to help clear out the sediement which can accumulate on the rubber seal in the TPR.
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It is difficult to determine how much sediment you can remove by opening the drain valve. But, it seems to me that you will get a similar flushing action by just turning on the hot water faucets full blast in your house, especially near the water tank. The hot water pipe existing the water heater is actually larger than the drain valve. If you really want to flush out the tank, you need a larger drain valve.