Question about Delta Faucet Plumbing

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Low pressure and flow on hot water side of single handle faucet

Pressure and flow on hot water side of a single handle delta faucet located on a kitchen sink is very low. Water is hot. Flow and pressure on cold water side is excellent. No leaks on faucet. Pls advise on how to repair. Thanks.

Posted by svanmalssen on

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    side handle lk6360nkmodel

  • Anonymous Mar 19, 2014

    hot and cold handles leak

  • Anonymous Mar 23, 2014

    Normally the light on the faucet flashes blue when working & red when the batteries need changing. We've changed the batteries & the light is still flashing red 3 times w/a 3 second delay between the flashes.

  • Anonymous Mar 23, 2014

    The red light flashes 3 times & then has a 3 second delay before flashing again 3 times, etc. Area on top is dry w/no pooling water.

  • Anonymous Mar 23, 2014

    The faucet flashes red 3 times, has a 3 second delay, flashes 3 times again, etc.

  • Anonymous Mar 23, 2014

    Light on faucet flahes red 3 times then a 3 second delay & repeat of this problem. Replaced batteries & still the same problem. Faucet will not work.

  • Anonymous Mar 27, 2014

    Replacing cartridge



2 Answers

Better Plumbing

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  • 33 Answers

It could be one of two problems, one simple, one serious.

  • Easy fix
  1. Turn off hot water angle stop under sink to faucet.
  2. Remove supply line from hot angle stop.
  3. Place end of supply line in a small bucket to catch some water.
  4. Turn on cold water for a couple of seconds and backflush debris from faucet.
  5. Reconnect supply line.
  6. Turn on angle stop and test
  • Complex fix
If you have steel pipes you may be experiencing reduced flow due to corrosion in your pipes. Reduced hot water pressure in the kitchen faucet is usually the first sign since this is the faucet that is most used in the home.

Repiping is a job for a professional. Another symptom you may need a repipe is orange colored or rusty water.

Posted on Dec 05, 2008

  • Ed Courtney
    Ed Courtney Jan 05, 2014

    I had this same problem, and solution 1 worked great. Thank you!

  • Better Plumbing
    Better Plumbing Jan 06, 2014

    Your welcome! Since I wrote that solution another problem has surfaced that could be solution #3. Chloromine in the water supply swells the rubber washer in the angle stop requiring replacement of the angle stop. You should consider hiring a pro to do this too if your skill level in plumbing is not advanced.




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  • 6 Answers

First answer is pretty much the same as mine, but here are some details FWIW -- I had a similar problem ending with pretty much the above solution after some exploring. First, I checked the faucet valve itself. Opened it up and it was fine. Then I checked the shutoff valve. It was also clear. Then I checked the hose from the shutoff valve to the faucet. No kinks, but there was a little piece of plastic slightly sticking out on the shutoff valve end. I pulled that out with pliers and reattached the hose. The water ran fine for a second, then slowed down again. There was clearly something in there, so I disconnected the hose from the shutoff valve and let it hang with a clear glass bowl under it. Then I turned on the hot water faucet, put my hand over the spout, and turned on the cold water faucet, forcing cold water backward through the hot water side. (With a one handle faucet, you would turn it on in the middle position to get this back flushing.) More pieces of plastic came out of the hose into the glass bowl. The pieces looked like broken bits from an old valve. These faucets were replaced just before we moved in 3 years ago, so this stuff might have been from the old faucet. A few months ago, my water heater was replaced, so it could have been junk from that. Bottom line: after that backflush, all is well.

Posted on Jan 26, 2016


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Follow these instructions to pull the whole valve assembly out and check the water flow of the cold water with out anything in the valve body. This will tell you if the problem is in the piping of the valve.

Page down to near the bottom and look for the PDF attachments. They will give you the details you need to take the faucer apart and amke the neccesary ajustments.

I hope that this will help you to solve your problem!

Thanks for using Fixya!!


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