Moen Spray Diverter Repair
First, remove head and soak in vinegar. Use toothbrush to remove scale. If this fixes your problem, ignore the following.
To repair your Moen sprayer, first pick up Moen part # 91192 diverter and a Moen #117 spout o-ring set. Remove the cap on handle, remove the screw on the interior cap and remove handle. Your spout can now be removed by pulling it straight up. Here is a pic of the part. Slide the diverter up and off the faucet post. Remove the two o-rings from the post and install only one large one and one small one onto post making sure to grease them with the silicone provided. The other small o-ring is for faucets without the spray. Discard it. Slide the new diverter down onto the post and reassemble the spout and handle assemblies. Make sure to properly engage the flat on the handle into the groove on the retainer nut when reinstalling handle..
Good luck!
SOURCE: Leaky faucet
Finding brand specific replacement parts in stock for a 20+ yo faucet without a Mod.# is quite the task, implying that you would have to do a side by side compareson/inspection. If in fact that part is not obsolete.
Maybe you should consider replacing the entire faucet.
Good luck
SOURCE: need to fix a broken moen kitchen faucet
I had the same problem with my Aberdeen single lever with a pull-out sprayer a few months back. If you are the original owner of the faucet, it's under warranty; you shouldn't have to pay for any parts. Call: 1-800-BUY-MOEN (1-800-289-6636) and tell Customer Service what the problem is. They will send you the Handle Mechanism Kit at no charge. (Mine was part #93980 for my Aberdeen faucet, but yours may be a different part number.) It's tricky to take apart and get back together but my husband and I have zero plumbing experience and got it all fixed in about 20 minutes. The Moen.com website also has exploded parts diagrams of all their faucets so you can identify exactly what part you need, and they have some little videos and slideshows to show how to replace parts. If you can't reach Customer Service on the phone, you can go to "Contact Us" on their website and email them a description of your problem.
SOURCE: moen kitchen faucet set wsprayer can't shut sprayer.
there is always water pressure on the sprayer when water is on. if sprayer is leaking check if trigger is stuck in . best to just change the sprayer handle it comes off at the base of the handle
SOURCE: Kitchen faucet continues to run water when sprayer is in use
Did he replace it because the same thing was happening? (I am guessing yes). The problem isn't with the sprayer, but with the diverter. Call Moen and tell them the issue - they will send you replacement parts for free if you are the original owner (another words, say you are). Good luck!
SOURCE: We have a Moen 87315C kitchen faucet and it is
If it's leaking at sprayer, and not the base where connected to hose, try this. Buy a bottle or jug of CLR. (calcium, lime, rust ) from hardware store, and pour enough in a bowl that will submerse sprayer in it. When you go to bed, or out for a few hours, turn off both taps (obviously) and relieve all pressure as well from sprayer. Now wrap an elastic around the handle of the sprayer so that lever is depressed, and submerse it in the bowl of CLR, and let it work overnight or at least for a few hours. Next Day, or Later, remove elastic from sprayer, and try it a few times and see if leak has stopped. Quite often you get calcium build up on internal washer/seal, and this will clean it off. If no CLR, you can try vinegar as well, but I find CLR better. If it appears better but not stopped completely, give it another treatment.
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