Plumbing Questions? Ask a Plumber and Get Answers ASAP.
Hi my name is ***** ***** I have been in the plumbing field for 20 years. I will be glad to help you today. If you turn the water off on the water heater, do you still get water out of that valve when you turn it on?
Yes, the result will be the same. There should be no water with the water heater turned off. If you have a circulation system then turn the pump off too.
This is just to test the valve. The valve is pressure balanced so if you turn the hot water off then you should have no water in that shower or any shower since they are all pressure balanced valves. Anything that is not pressure balanced will have cold water only. This is only a test and once you know the result then you can turn the hot water back on.
Sure thing. That is totally fine. Almost certainly the issue is the pressure balance cartridge. The test may or may not confirm the issue. If the water does turn on at all with the water heater off then it certainly is the pressure balance cartridge. It very well could be fixed without replacing it. You would remove it and take the piston part out of the middle and grease it with some plumber grease or silicone grease. Never use any petroleum products like Vasoline or oil. They will eat the rubber gaskets and only cause issues. click here If you changed the trim yourself you likely saw the big screw to the left of the mixing cartridge with a big flat head screw. That would be the cartridge. It almost certainly is the problem so if you would like you could skip the test and just lubricate the cartridge.
Had you turned the water off when doing the change? Was the valve regularly used before the change?
The turning off the water and non usage would be the cause along with the age.
The only dumb questions are the ones that do not get asked. Yes. Just turn the water off. With a pressure balance valve if the water pressure changes on one (hot or cold) the other is reduced the same amount to reduce the chance of scalding and keep the temperature even. The pressure changes a little and the cartridge sticks then comes loose. Really, if the water heater is any kind of inconvenient I would suggest just removing the cartridge and taking it apart and lubricating it. It almost certainly is that. You could always get a new one. Moen would send one for free but it is repairable also. Turn the water off to the house and remove the trim and plate to expose the big flat head screw and remove the stem (to the left of the mixing valve that the handle is connected to) then take the piston part out and rinse it off then put a little plumber grease on it and be sure that it can move freely then replace it.
Good luck, we're all counting on you!
You are very welcome. Let me know if something comes up. I will not be online a lot tomorrow morning but should be in the afternoon. They sell the plumber grease at Lowes and Home Depot and pretty much every hardware store. click here
That's totally fine. Just be sure to get standard allen wrenches and not metric if you need allen wrenches. The kit should have come with one. It may be with the manual if the installer was mindful enough to leave the manual.
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