Why the Hot Water Runs Slowly in a Kitchen Faucet

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A kitchen sees a lot of use in a home, and its sink and faucet often work overtime. If your cold water runs fine, but the hot water runs slowly, the problem more than likely exists in the hot water piping. Check key piping components to get the hot water flowing again.

Putty or Tape

  • If you recently installed a new faucet and suddenly notice the hot water runs slowly, it's a good bet that plumber's putty or Teflon thread tape may be the culprit. Faucet piping is small, and any small clog item, like a piece of tape or other debris, can keep flow down. Check the faucet connection at both ends and blow out piping before reinstalling.

Mineral Deposits

  • If the faucet is not new, hot water contributes to the buildup of calcium and magnesium "scale" in hot water lines. Replace any connection hoses and check valves for mineral deposits. Clean mineral deposits from valves and reinstall.

Misaligned Gasket

  • A misaligned gasket in the connection hose can cause hot water to run slowly, because the gasket blocks the flow of water through the connection hose. Check each end of the connection, and properly align any gaskets within the hose fittings.

References

  • "Popular Mechanics"; 10 Quick Fixes for Problem Faucets; December 2009
  • Photo Credit Joe Madeira/Stockbyte/Getty Images
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