There is a leak at my apartment complex coming from the MOEN shower head or faucets. There is cold water returning to the water heater making the units never turn off and people not receiving hot water. If the shower or faucets are not leaking could there be interior leak with a cartridge to send cold water back though the lines. There is no water of any leak on the interior or exterior of the building. I believe over 7000 gallons is getting wasted everyday. Can you help??
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Assuming that you have hot water at other faucets the problem could be a varnish buildup in the cartridge. After shutting off the hot and cold water either by turning off the main or at the faucet stops (if equipped), remove the cartridge and soak it in white vinegar to break up the varnish. You can clean it up with an old toothbrush and make sure that it is working. It should rattle when you shake it. new cartridges are not very expensive so you can just buy a replacement at any home center as well. If you are the original owner of the faucet Moen will send you a free replacement cartridge if you call them.
You need to replace the stem. This will not cost you a dime; call MOEN and tell them the issue, with the model number, and they will send the replacement part. Many people don't know that MOEN is guaranteed for life (to the original owner)......another words, say you are the original owner :) They will not ask any questions. Good luck! PS Also works on any MOEN faucets you may have.
The cartridges in the single handle units are prone to display this issue in hard water areas as mineral deposits such as calcium build up on the stem. The stems also have small rubber band like rings - for lack of a better term- that break apart and can clog the ports on the side where the are on. New stem should resolve the issue totally unless you have had a pipe break or other construction to the plumbing system recently. Thanks for using Fix Ya.
1st Check the temperature restricting coller behind the cover under the handle. It is used to restrict the flow of hot water to stop you from being scaulded.
2nd Those set screws will control the flow. Check to ensure both sides are open the same amount of turns. If the water pressure is good turn in the cold side.
Replacing the cartridge should solve the problem, the balancing spool is stuck, replacing it will solve the problem. The valve should look like this http://www.moen.ca/shared/pdf/3170pt.pdf . I have unstuck the spools in the past, soaking it in white vinegar will help to remove build up.