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I have a situation where all hot water faucets in my home give me a dribble and eventually turn off. However, if I turn on the hot and cold, and turn on another hot water faucet nearby, then the nearby one runs water from the hot water faucet with low pressure, but doesn't run out.

Also, the water from the nearby hot water faucet never turns hot. We have had freezing temperatures, so it's probably related.

What can be the cause?

What can I do to fix the hot water issue?

Update: If I turn on all hot water faucets, the eventually dribble out and turn off. Then, if I turn on any cold water faucet, then I get a dribble in all off the hot water faucets.

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  • See the comments under this question to see if your situation is similar - diy.stackexchange.com/questions/216593/… One thing if you have gas water heating is that if the flow is too slow it will not switch the gas on. It needs a certain pressure across the diaphragm to trigger the gas. – Tetsujin Feb 17 at 13:34
  • It sounds similar, but our cold water line is fine with normal pressure. It seems a little different to me. – Shilpam Feb 17 at 13:48
  • Sounds like the cold water SUPPLY to the water heater is frozen. turning on other faucets back feeds from the cold line to the hot line at the mixing valve. If you turn one of the other faucets to full cold and then get no water out of the hot on other valves, that would confirm our theory. PLEASE be care full here, if you have copper or iron pipes that froze, there's a very good chance they will burst and cause major damage when they thaw (been there, done that twice!), Know where your water shut off is and that you have good access to it. – George Anderson Feb 17 at 14:29
  • ...ran out of space in the comment box..... A lot depends upon the type of faucets you have and type of water heater (tank or on demand?). If you have PEX plumbing, you should be safe from any bursting, but again, copper or iron could be a real problem. – George Anderson Feb 17 at 14:33
  • Where would I find the mixing valve? When I look under the sink, I have a separate hot and cold lines coming out of the wall. – Shilpam Feb 17 at 14:42
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Sounds like you are draining your hot water heater by gravity ,then it slowly refills . The slow refill is because of a restriction in the supply lines or very low city pressure, Right now I also have the very low city pressure ( E TX). First verify what is the situation of your city water pressure.

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