My two-handle bathroom sink faucet suddenly went weak on both cold and hot sides. I can get cold water or hot water (using H or C handle separately) but no warm water. Turning on Cold and then adding the Hot side (and vice versa) does not increase the flow from the faucet spout.

  • What happens if you turn on cold, add hot, then turn off cold? Do you get hot water or no flow at all?
    – MTA
    Jul 25, 2022 at 21:23
  • Thanks for the quick response! I get hot water with no change in flow strength. Normally if I turn on cold and then add hot, the flow from faucet nozzle increases, but there is no additive effect. And it's weak flow overall now.
    – Sam
    Jul 25, 2022 at 21:36
  • Pressure in rest of house is normal, BTW.
    – Sam
    Jul 25, 2022 at 21:37

1 Answer 1


You may have a chunk of debris in your aerator, reducing total flow. If flow is restricted, you won't see any difference in flow between one faucet and two faucets turned full-on. So try cleaning your aerator.

If you don't know how to clean your aerator, see this link.

Even before you clean the aerator, you can probably get hot + cold = warm water by turning on one faucet just a trickle, then turning on the other till you get more of a trickle.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.