Question about Moen & Posi-Temp Single Handle Shower Or Tub Valve

1 Answer

Single handle moen bath fixture only lets out hot water

Posted by on

  • Anonymous Mar 11, 2009

    Only let out hot water! Plumber is already ripping the drywall out from behind it as he can't take the valve out from the front for some reason. . .



×

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 7 Answers

Remove the cartridge and see if their is anything blocking the cold inlet.If you dont see any dirt than that means that the cartridge needs to be replaced

Posted on Feb 02, 2009

  • ed brown Nov 04, 2010

    Ah ha. or Eureka. Moen shower valve bodies can clog internally, and there is a simple fix!

    First test for flow should be performed with the shower head removed, as those are often clogged.

    On the Moen Positemp Shower Valves you must first remove the cartridge. If replacing the cartridge does not improve the flow, you should first verify that you are getting plenty of flow to the valve body. Do this by leaving the cartridge out, stand back, and have someone slowly open the water main until you can verify that there is plenty of flow to the valve body. (Using cell phones makes communication easy) (You can use a towel or rag a few inches from the opening at the valve, as a water deflector to help you stay dry

    If there is plenty of flow to the valve and if the cartridge is new, the only thing left is internal clogging of the valve body itself. This can occur over time with sediment accumulating in the tiny orifice connecting the inner diameter of the valve body to the valve outlet to the shower head.

    Using a light you can examine the inner surfaces of the valve body while the cartridge is removed. Once you see or feel the roughly 3/16" HOLE in the internal diameter of the brass valve body this opening, and the passage from it is the likely suspect. This 3/16" opening connects internally to the valve outlet to the shower head itself . The best cleaning tool I have found for the job is a 4" or longer piece of a plastic tie wrap smaller than 3"16 in width. Bend a radius in the end of the tie wrap and insert it into the small hole of orifice in the inside of the valve body. You should be able to slide it inward about 1 1/2" or more. The direction you want the tie wrap to travel is toward the rear or back of the valve body. Work it in and out 3-4 times and your obstruction should be cleared. Reinstall your cartridge, and the clip, and turn on your water main. You should have much improved flow. After rinsing the shower head line for a minute, you can then reinstall the shower head.

    Bingo, hopefully you just saved yourself a $500 plumber's bill.

    ( If you can't insert the tie wrap and get about 1 1/2" of insertion then you may have a blockage which may not be removable)
    (Tie wraps have small ribs or notches in them. When you bend the tie wrap to cause it to enter the 3/16" opening and get the desired 1 1/2"insertion - sometimes the tie wrap will be difficult to remove. This can be due to the ribs of the tie wrap catching on the 3/16" opening. You can slide you index finger inside the valve body and while pushing in on the tie wrap where it enters the 3/16" orifice - and pulling out on the tie wrap at the same time - it should come on out)

    To all you fine people who replaced the entire valves - sorry about that as it really was not necessary! Good luck to all the rest!

    If your Moen Positemp pressure balanced dingle lever shower valve has Stopped Flowing Almost Completely, even after the cartridge and the shower head were replaced, and if the trick above does not improve the flow, there is a next step you can take if your are a fairly well skilled handy person. The problem here is likely a very badly clogged valve body that is not serviceable - or at least that's what Moen thinks. So if you can't clear the output with the flexible piece of tie wrap material as described in the prior post, here goes....

    Before you go further, be certain that this is your problem: Remove the shower head. Twist the elbow so that it points upward. Using a funnel, see if you can pour a glass full of water into that elbow and see if it flows nicely out of the front of the valve body (where the cartridge is removed). If the water backs up in the elbow, you have a clogged valve body, for sure. Since your water may be off at this point, you can dip a cup into the back of any toilet tank as a water source)

    At this point you have identified that you have 2 choices - 1) replace the complete shower valve or 2) perform the following procedure. For most skilled do-it-yourselfers the complete valve replacement is a good half day job, plus the cost of the new valve maybe $150, and you end up with a hole in the wall behind your shower. With my alternative procedure, you should be able to complete it in an hour or so, and the cost of the supplies (except tools) should be under $5.

    Tools/material needed:
    drill, 1/8 drill bit, 7/32 drill bit, teflon tape, 1/4 20 tap, crescent wrench, 1/4-20 set screw or plug (preferably brass or nylon), coat hanger, small compressor, air blow gun attachment

    You will notice the round hole in the bottom center inside the valve body. This is the outlet to the shower head. Directly below this hole, and just below the round opening to the valve body, you will see a small squared off area on the outside of the valve body. This squared off section is the passage way or port for the water output to the shower head. The flat front face of this channel measures about 1//2" square, and if you feel the sides of it, you can tell that it extends to the back of the valve body maybe about 1 1/4" or so.

    To clear this channel you can drill into the front face of the brass valve casting body with a quality 7/32" steel bit. (You can make a pilot hole using a smaller 1/8" bit first if you like) Next use a 1/4 20 male tap and tap threads into the opening you just created. Using a coat hanger or similar wire, you can thoroughly clean out or dislodge any deposits inside the channel.

    Next using compressed air from a compressor and a hand triggered blow off gunt, hold your index finger over the round outlet hole inside the main valve body opening, while at the same time forcing compressed air into the new tapped hold you just created. This air should dislodge any deposits and any water which remain, and they will forcefully exit above at the elbow at the shower head.

    Using a good coating of teflon tape install a 1/4- 20 allen screw into the tapped hole, just 3-4 turns or until it's snug. You can also use a 1/4-20 brass or nylon plug if you can find one. To avoid corrosion on the plug or allen screw it's best to use one made of brass or stainless if you can find one. You can also use the threaded end of a nylon 1/4-20 bolt and cut off the head to make a plug if you can't find one. You can add you slot head to the end you cut off using a hack saw. Lowes and most hardware stores have nylon 1/4-20 x 1/2" bolts.

    Reinsert your cartridge, install the cartridge clip and the plastic knob. Install your shower head. Turn your water on, and bingo - you should have more water than you have seen from this shower in years!!!! If it works for you , you just saved probably $500 you would have had to pay a plumber! Plus you have the immense satisfaction of saving a shower valve body that you would otherwise have had to trash.

×

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Why does moentrol bath valve give hot water pointed to "C" and vice versa?


Easy one.
Feel the pipes. The pipe on the right should be cold. If the pipes are correct, turn the cartridge 180 degrees.

Jan 20, 2013 | Moen & One Handle Tub & Shower Faucet

1 Answer

We had both the shower and the Bath tub remodeld and installed new Moen faucets with a single knob that turns right to left to open. All was fine for a couple of days but all of the sudden they startd...


You need to install a new moen cartridge its a single handle posi-temp cartridge you should be able to get 1 for free if you are the original owner by calling 1-800-buy-moen more than likely when soldering in the new valve a little bit of solder broke free into the cartridge or hard water. When the water gets turned off and then turned back on it can break free alot of particles that can get jammed up in these cartridges or any fixture for that matter you will need a cartridge puller to perform this job with ease.

Aug 27, 2011 | Moen & One Handle Tub & Shower Faucet

1 Answer

Moen Kingsley Moentrol single handle bath/shower fixture. Had guests use this recently and they only could get hot water. When you turned the handle to cold nothing comes out. Only hot when turned the...


Sounds like the cause of your problem is the pressure balancing spool. Call Moen at
1-800-289-6636
and explain the problem. They will send a repair part to you free of charge. the link below is a "blow up" of your valve.

http://www.moen.com/shared/pdf/t3113pt.pdf

Mar 10, 2011 | Moen & One Handle Tub & Shower Faucet

1 Answer

Moen Shower Valve Model L82839 installed: Water comes out of shower head when running bath. Thanks.


Only two possibilities here the diverter tub spout is not open all the way to let water to the tub only or the shower valve is installed up-side-down.

http://www.moen.com/shared/pdf/l82691pt.pdf

Mar 06, 2011 | Moen & Posi-Temp Single Handle Shower Or...

1 Answer

We have a home that is 3 years old. We never used the 3rd bathroom shower until today. We have a Moen single knobe shower/bath valve. To get water from the faucet you pull the knob out. To adjust the...


Remove handle to gain acess to the temperature limit stop. Remove handle and pull out handle adapter kit and next there is a dail that can be adjusted to control the water to balance the temp. It could have been installed wrong, pay attention to where it is now and pull it back to it disengages out of the stem and move it counter clockwise a little and reinstall. Put handle on and test water for correct movement.

Go to link below for a part's diagram if needed.

TO ORDER PARTS CALL: 1-800-465-6130
www.moen.com

Aug 15, 2010 | Moen & Posi-Temp Single Handle Shower Or...

1 Answer

I just put in a Moen single, chrome handle shower faucet in my hall bath. Got it all together and the hot water is not comming out. Cold water is fine, but, when i turn the handle to the position where the...


If this is a Moen posi temp valve you may need to adjust the temperature limit stop. It is located under the handle. Usualy a plastic peice with grooves in it so it fits in another peice in the valve. If I remember right you pull this peice out and turn it counter clockwise to get more hot water. Do this in small increments and reassemble and test. I hope this helps.

May 25, 2010 | Moen Posi-Temp Single HandleTub And Shower...

1 Answer

Moen kitchen faucet. I changed the cartridge but


Single or dual lever? A new ball if single lever. Home Depot or Menards will carry them. Teflon tape if dual cartridge. Stay away from moving parts

Aug 14, 2009 | Moen & One Handle Tub & Shower Faucet

1 Answer

Temp control doesn't allow water to get hot enough


remove the handle and there should be a white plastic deal behind the handle that you can remove it's a temperature limit setter so people dont burn themselves remove it and you will get the full hot water

Aug 10, 2009 | Moen & Posi-Temp Single Handle Shower Or...

1 Answer

Shower head leaks water when water is turned on


take out the cartridge from the fixture and make sure it has all of the "O" rings and stoppers.
look at the instruction again, make sue you are installing it the right side up. if all that, the shower still leak, then you need to talk to the place you brought the fixture, it may have a defective cartridge.

Jan 10, 2009 | Moen & Posi-Temp Single Handle Shower Or...

Not finding what you are looking for?
Moen & Posi-Temp Single Handle Shower Or Tub Valve  Logo

522 people viewed this question

Ask a Question

Usually answered in minutes!

Top Moen Home Experts

Mike

Level 3 Expert

4332 Answers

john h

Level 3 Expert

7409 Answers

nathan

Level 3 Expert

634 Answers

Are you a Moen Home Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...