My husband and I recently moved into a new house that has two water heaters. One is gas and supplies the main portion of the house, the second is electric and (as far as we can tell) only supplies the extra bathroom added in our garage conversion. We flushed the gas heater today and now have no pressure at our kitchen sink, but only when hot water is turned on. All bathroom faucets and our laundry machine are working fine.

We took the following steps:

  1. turned off gas
  2. turned off water
  3. opened the pressure relief valve
  4. opened the drain valve
  5. let water drain
  6. closed drain valve
  7. closed pressure valve
  8. refilled heater
  9. turned on gas

Our only guess currently is that somehow the pipe to the kitchen clogged, but we haven't had a chance to try dismantling anything yet.


First thing to check is the faucet aerator. You're probably right about kicking sediment up and clogging something, if you're lucky its just the aerator. It'd take a big piece or a lot of sediment to completely clog a 1/2"-3/4" pipe.

If it's not the aerator, and it's just a single faucet, you have to work backwards starting with the supply lines connecting the faucet to the shut-off valve, all the way back to the water heater.

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  • Also, the faucet valve is more likely to clog than the pipe. Easy to test because you can just disconnect the water supply line under the sink and open the valve. – longneck Feb 24 '14 at 12:22

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