The water pressure at the kitchen sink starts out fine but dwindles down to just a trickle in a matter of seconds. The sprayer has full pressure. When I use the sprayer, after I shut it off, there is only a dribble from the faucet. Sometimes there is a little stream of water coming from the faucet when I use the sprayer. The lack of pressure from the faucet is there whether I use the sprayer or not. The water pressure is fine throughout the rest of the house. Any suggestions?

 

Remove faucet aerator and clean debris out of it. Flush faucet with aerator off, then reinstall.
Good Luck!

 

Already cleaned out the aerator, didn't help. The aerator was clean and had no clogs. What should we check next?

 

"Alrighty, then!" Since you've eliminated the most common problem, it has to be in the faucet assembly itself.
What type/brand do you have? (as in "single lever, Delta, etc.) They most all can be repaired with kits.
I'm not a plumber, and even I can do it. lol.

 

American Standard single lever faucets have a cartridge under the handle that needs to be replaced when the water pressure starts to drop. I'm sure that other manufacturers use a similar setup. I thought I had a problem with water pressure or a bad valve but after checking with the city, then changing the valve under the sink, I found this out and it was the problem all along. Good luck. I hope this is your problem because it was a simple fix.

 

Hi: I have this same problem and replaced the cartridge with no success. Can you please advise clearly how yours were fixed (ie. replaced valve under the sink - where under the sink?) Sorry to be ignorant...

Thanks,

Hong

 

If you stayed with your orignial "thread" It would have been easier to answer..
AW... sounds like the "diverter that's built into the faucet is stuck. It's what shuts off the "spout" when you use the sprayer. I'm not really up of the workings of American-Standard faucets but if it's anything like Moen or Delta/Peerless then you may find it by turning off the supply valves, removing the handle (usually a screw or allen set screw) and then you should see how the "spout" is held to the valve body! If you can remove the retaining nut, usually as big around as the spout then the spout assembly should slide up off the "body". You should be able to see a little "mushroom" looking thing then. you may be able to clean it, or replace it with an identical part!

 

Underneath the sink there are two supply lines (one for the hot water and one for the cold). I thought one or both may have been frozen in a partially open or closed position therefore reducing the water flow. They valve replacement is rather simple. It just requires matching the correct valve for the particular type of piping that you have.