Thank you for the info on the pump. I can see how that works now. This is not a new house and they have not had this trouble for the whole time. They do get hot water but it runs out in about 10 minutes or so. The heater is turned up to a very high temp. and the gas pilot is on. The burner go on and off just fine and the hot water the do get is HOT.
Thanks again for your time and help.
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