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Faucet · Repair Copilot

Low water pressure at one faucet

When just one faucet has low water pressure but everything else in the house is normal, the problem is local and almost always a clogged aerator or a partly closed shutoff — not your whole plumbing system. It's one of the easiest fixes there is. Point your camera at the faucet and a veteran plumber persona walks you through clearing it in a few minutes with no special tools.

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Steps to fix low water pressure at one faucet

  1. Confirm it's just this one fixture (and note if it's weak on both hot and cold, or only one side — one side points to a clogged supply or valve).
  2. Check the two shutoff valves under the sink are turned fully open (counterclockwise).
  3. Unscrew the aerator at the tip of the spout by hand (or with tape-wrapped pliers), and look for grit, mineral flakes, or debris in the little screen.
  4. Rinse the aerator, soak it in vinegar if it's crusted with mineral scale, then reassemble and test.
  5. If only the hot side is weak, sediment from the water heater may be clogging the supply line or the cartridge — remove and flush the line into a bucket.
  6. If the aerator's clean and both valves are open but flow is still weak, the faucet cartridge may be clogged — pull and clean or replace it; if the low pressure spreads to other fixtures, that's a bigger supply issue for a plumber.

Safety first: if a step calls for gas, a main water or sewer line, a service panel or main breaker, or a sealed refrigerant system, stop and call a licensed pro — Repair Copilot will tell you when you're there.