20 Most Recent Moen & Posi-Temp Single Handle Shower Or Tub Valve Questions & Answers


I have the same problem. Anyone know how to fix this?

Moen & Posi-Temp... | Answered on Jan 27, 2019


Remove the handle and adjust the temperature limit stop. This is a plastic geared piece which you can pull out and spin clockwise to they 1 o'clock position and then put back in. This prevents your handle from spinning too far to the hot side. As far as uneven water flow goes it sounds like your showerhead may be clogged. Put a 50/50 solution of vinegar and warm water into a baggie and place it onto your shower head using a rubber band to keep it in place. Your uneven flow may also be a result of a partially clogged cartridge. If that is the case, change the cartridge. Here are the instructions.MOEN CARTRIDGE REPLACEMENT There are two different types of Moen cartridge for a single handle valve. The first and most common one is the plastic 1225 cartridge that is used for all Moen single handle valves that are not posi-temp shower valves. This cartridge also comes in brass which is number 1200, but it is more expensive and doesn't last any longer or work any better than the plastic cartridge. The posi temp cartridge is a number 1222. This is the replacement cartridge for shower valves that you turn rather than pull. As you turn the valve it goes from cold to warm to eventually hot. The tools needed for this procedure are pliers, Phillips screwdriver, a small flat screwdriver or awl, a 3/4 inch copper cleaning brush, silicone or heat proof grease, a knife to pull the cap on an acrylic handle, or a 7/64 inch Allen key to remove lever handle.
If it is an acrylic handle simply pry off the cap and unscrew the screw with a Phillips screwdriver. If it is a lever handle there is a set screw which is 7/64 of an inch. Use an Allen key to remove this set screw. If it is a lever handle when the handle is removed you must use a Phillips screwdriver to remove the handle adapter.
Before removing the cartridge make sure that the water is turned off and open the valve to bleed off the pressure. Leave the valve in the open position as it will facilitate the removal of the cartridge if the spindle is in the open position. It can be turned off at the main which is usually the easiest thing to do, or you can remove the faceplate and there may be integral stops behind the faceplate. Use the integral stops if your water main is hard to reach. On the brass spindle of the cartridge there is a notch on one side. Before you remove the cartridge take note of what position this notch is in because that is the position in which the cartridge will be placed. Do not forget this step as a posi temp cartridge will not function properly if installed with the notch in the wrong place. If you install the regular cartridge with the notch in the wrong place, hot and cold will be reversed. Simply remove the handle and spin the spindle 180°.
Pull off the chrome stop tube that encloses the cartridge. There is a horseshoe-shaped retainer clip that must be removed. Use the small screwdriver or all to pry up the top of the retainer clip. A plastic square head removal tool comes with the cartridge that you have purchased. Place this on the cartridge and spend back and forth to loosen the cartridge. Then take your pliers pull the brass spindle straight back towards you. If this proves too difficult and you are unable to pull it out you will have to buy a Moen cartridge pulling tool. Be sure to buy the right tool as they are not interchangeable. The posi temp tool is much fatter than the regular tool. The tool operates the same way a hub puller. Back off the knot on the tool as well as the screw. Place over the cartridge and advance the screw all the way. Now advance the nut.
After the cartridge is removed take the 3/4 inch copper cleaning brush and insert into the cartridge housing while spinning clockwise. When removing the brush also keep spinning it clockwise. After brushing, open the water main for about three seconds to flush the line out.
When installing the cartridge make sure that your notch is aligned properly and that the cartridge is pushed in all the way and that the two tabs on the cartridge are aligned vertically. Install the retainer clip. If it doesn't go in all the way either the cartridge has not been pushed in foreign off or the two tabs are not aligned properly. You can use the plastic tool to align the tabs properly and to help push in the cartridge all the way. Reassemble faceplate and handle and you are done.

Moen & Posi-Temp... | Answered on Jul 19, 2016


You have to remove cartridge and rotate 180 degrees then re-install. Was it removed or replace lately?

Moen & Posi-Temp... | Answered on May 20, 2016


Sure - there is always help at FixYa!

This sounds like a bad cartridge. They can be replaced. To replace the cartridge:

Turn off the water to the tub/shower.
Remove the handle cover (it should pop off)
Remove the center screw (usually phillips head)
Remove the retaining clip holding cartridge in - you can use a pair of long nose piers or a small screwdriver
Grab the cartridge with a pair of pliers and pull straight out. It may require a little force - there are O-rings around the cartridge to keep it from leaking.
Check the cartridge bore (the hole where the cartridge was removed)
Clean any debris or scale - lime away or CLR will work
Apply a little bit of soap around the new cartridge to help it slide in easier. Push it all the way in and make sure it is seated. Re-install the clip (you should have received a new clip with the replacement cartridge)
Turn the water back on a check for leaks
If OK, reinstall the knob screw, and cap.

Let Mom take her warm shower...:)

Moen & Posi-Temp... | Answered on Feb 27, 2016


If it needs to be replaced then do that you might have to go to home depot to find out what you need to solve the water pressure problem usually the valves in the pipes could be an issue hopefully it's not something the plumber has to get involved with that can be pricey but call or visit your local Home Depot store so they can be better to assist you.

Moen & Posi-Temp... | Answered on Jul 10, 2015


If you have a acid rust and calcium remover such as "Lime-Away" or CLR. these may be strong enough to break the rust (the set screw is probably steel) or collected lime holding the threads fast.
Some tile/bathroom cleansers also contain mild acids also.

Position the handle so a drop or two stay in or, if it disappears, soak a cotton swab in the solution and press it into the screw head.

I don't think I would leave either of the commercial products in overnight unless a few hours of soaking doesn't help.

Moen & Posi-Temp... | Answered on Mar 16, 2015


Cartridge has been installed upside down. Remove, spin 180 degrees and re-install.

Moen & Posi-Temp... | Answered on Mar 16, 2015


The trap is installed incorrectly

Moen & Posi-Temp... | Answered on Mar 16, 2015


A bit more information is needed; is this a Moentrol or a Posi-temp valve? You will need to shut water down to the shower. If it is a Moentrol, it could be an issue with either the cartridge or the pressure balancing spool. If you are at least getting water, I am going to assume that it is a Moentrol.
You will need to turn water off to the valve. Pull the cartridge and examine as to whether or not debris is blocking the supply holes of the cartridge. If your valve has built in shut off screws, you can slowly turn water on to clear any debris that may be inside the inlet port. I typically use a piece of PVC to go over the valve body so that water does not leak between the wall and the shower. Again, just turn water on enough to start it flowing.
If you do not notice anything amiss with the cartridge, it could also be the pressure balancing spool. If that is on your valve, it will be a flat head screw about the size of a nickel. Water will need to be off for the removal of the spool as well. Again, you will be looking for debris that is blocking water flow.
If this is an older Moen faucet, you may just want to replace the cartridge while you have it removed. If it is a push/pull, it is a Moentrol. If you have to turn the handle for water to come out, it is a Posi-temp. In my area, the cartridges run from $20-$40. However, Moen does offer lifetime on their cartridges. Lately, I have had a few more hoops to jump through to get the replacement cartridges from Moen, but they are still very pleasant to deal with.

Moen & Posi-Temp... | Answered on Oct 31, 2014


Temp control is only accomplished by moving handle to desired position. If your asking is the hardware that in behind the single lever going to allow for adjustments, then the answer is NO. I installed the same into one of my bathrooms several years ago and I know what I am talking about. The single handle on that type on mine starts off then cold to hot. Problem is I wait for hot water to max so I can adjust it down to a comfortable temperture to prevent being burned. I refuse to buy one for other tubs. The 2 handles make temperture much easier with less wasted water used until its hot. Remember if you decide to replace with a two lever model then you will have to replumb the pipes for a two handle hardware unit (thats the stuff behind wall that your single handle goes into to which is currently plumbed for a single handle hardware unit.)

Moen & Posi-Temp... | Answered on Feb 07, 2014


Wow A Mystery Faucet!!! SOUNDS LIKE THE WATER LINES FEEDING THE FAUCET MAY BE SWITCHED. CHECK TO MAKE SURE THE COLD FEED GOES TO THE COLD SIDE AND THE SAME FOR THE HOT. SOMETIMES MISTAKES ARE MADE WHEN INSTALLING THE FAUCET. MAKE SURE THEY ARE CONNECTED THE SAME AS THE 2 THAT ARE WORKING. IF YOU HAVE THE TIME AND PATIENCE, YOU CAN TAKE A WORKING FAUCET AND INSTALL IT IN PLACE OF THE (mystery faucet) AND SEE IF YOU HAVE THE SAME RESULTS. IF YOU GET HOT WATER IN THE TEMPORARY FAUCET, THEN YOU HAVE A DEFECTIVE FAUCET. THESE ARE A FEW TROUBLE SHOOTING TIPS I HOPE THAT MAY HELP YOU.....JOE

Moen & Posi-Temp... | Answered on Nov 15, 2013


It sound like you have a Moen Posi-temp faucet and the handle is broken. It is probably an acrylic hdle with a tear drop shaped cover. Take a knife and slide it under the cover to pry it off. Unscrew the center screw and the handle will pull right off. You will see two shoulders inside the hdle, one of which will be cracked and broken. Replace the hndle which can be purchased at any Lowes or Home Depot. Plumbing supplies also carry replacements, but you can probably get one cheaper at HD or Lowes.. Make sure to use the washer provided. It has two flats on the inside of washer. Slide this over the brass stem on your cartridge, NOT on the hdle screw. Install it with the flats of the cartridge in horiz. position. Try faucet. If the water comes out in the opposite temp you expect, warm is cold, and cold is warm, remove the hdle, spin the stem 180 degrees and reinstall hdle.Good luck!

Moen & Posi-Temp... | Answered on Oct 25, 2013


I hate to say this but maybe the inside of the allen screw has been rounded out by a previous worker. You can drill the screw out and replace the handle with a new one. NOTE: Moen replacement parts are not cheap!

Moen & Posi-Temp... | Answered on Mar 03, 2013

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