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

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When faucet is fully closed hot water keeps on leaking.

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You need to replace the valve stem. Turn off house water, locate and loosen handle set screw, remove cylindrical cover, and remove retaining nut to access stem. Take e stem with you to a home store or plumbing supply house for accurate relacement.

Posted on Oct 07, 2010

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Posted on Jan 02, 2017

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1 Answer

I need to replace the hot water handle


A picture, model, or brand of the type of faucet you have will be helpful as there are only three types of faucets. One hole, two hole, and three hole faucets. The one hole ones have two types: a single hot or cold, or a mixer valve to combine hot and cold into a single faucet. Each have a surface mount or wall mount version.

They all follow the same similar installation method. Turn off water supply. Unscrew supply lines from supply to underside of the faucet. a Plumber's wrench is needed or a spanning crescent wrench to remove the supply lines.

-Unscrew whole assemble from the sink.
-insert new one into the same hole as old one.
-from underneath, install the new faucet using the supplied hardware.
-Use plumbers tape (Teflon tape). It's often a white or pink silicon tape around the threads prior to screwing the supply lines back in. Re-connect the supply line.

-Open hot water faucet to maximum. Slowly turn on the water supply. Watch for leaks and drips. If any close the water supply and undo the supply leads and apply more Teflon tape.

- to apply tape. Start at the end and pull tightly, wind the tape into the threads in the direction of the turn. Do not wind in opposite direction.

-Try to turn on water again, turn slowly until it is at maximum, watch for leaks and drips.

-now slowly close the faucet and continue watching for leaks and drops.

If the faucet is fully closed and there is no leaks, you've done a good job... basic plumbing 101.

Now if your pipes are solder types and not screwed in supply line, and you're not confident with a torch or have little experience, ask for help from a friend who has some torch knowledge or hire a plumber. It is simple to do but requires a lot more steps than simply screwing in and unscrewing supply lines.

Aug 30, 2015 | Plumbing

1 Answer

My Marey tankless water heater will not ignite for the shower, but will forthe faucets. Have changed batteries, cleaned the filter and had the showerhead cleaned. Local plumbers will not do...


Most on demand or tank-less units require a minimum flow rate before the unit will fire up, they designed them that way so small water leaks (drips etc.,) keeps the unit from going on needless;y. Try opening the shower hot water fully and see if it comes on, If it does, try closing it slowly to see where it shuts off. Make sure your shower head is clean and not blocked with calcium, which will restrict the water flow. You could also try changing the shower head to one that allows more gallons per hour flow rate. Also make sure the cold inlet and hot outlet valves on the unit are fully open and the diverter on the shower is fully open as well.

Mar 24, 2015 | Water Water Heaters

1 Answer

How do i stop air pop when hot water faucet first turns on?


kinda sounds like a form of water hammer. try shutting of water at house main. open lowest and highest faucets to let them drain for a bit and introduce air into system to replace air in any anti water hammer setup you might have. then close them, turn water on. open faucets to get air out. and see if that improves the system. good luck

Mar 14, 2015 | Plumbing

1 Answer

Search Fixya...


    • Test the dripping water with your hand to make sure that it is the hot water side that is leaking. Lay a rag over the sink drain to keep parts from falling down it. Locate the hot and cold shutoff valves under the sink and turn the knobs clockwise by hand until they close. If the knobs remain stiff, use a pair of pliers to gently turn them until the knob begins to move, then finish turning by hand.
    • 2
      Pry the decorative cap off the faucet top with a small thin, flat-head screwdriver. Remove the cap that has the "H" letter on it. Depending upon the handle screw configuration, use a flat-head or Phillips-head screwdriver to remove the handle screw. Gently pry up on the handle from all angles and pull it up and off the splines of the stem.
    • 3
      Use a crescent wrench to turn the hot water stem nut counterclockwise until it comes completely off the stem shaft. Wiggle the stem with your fingers and pull it out of the faucet. If the washer on the bottom of the stem is deformed, it indicates the source of the leak. However, remove the old seat from the faucet base with an Allen wrench or a seat removal tool.
    • 4
      Wipe out the inside of the seat housing with a rag. Replace the seat with the new one included in the repair package, using an Allen wrench or seat removal tool.
    • 5
      Place the new hot water stem shaft into the valve seat, and start the stem nut in by hand, turning it clockwise. Finish tightening the stem nut with the crescent wrench, but only to a moderate firmness -- do not over-tighten it. Place the handle back over the stem shaft and tap it down until it seats firmly. Replace the handle screw and tighten it with a screwdriver.
    • 6
      Turn the hot and cold water supply knobs counterclockwise until they are fully open. Turn the hot water faucet knob to the "On" position and check for leaks.

Jul 09, 2013 | Computers & Internet

1 Answer

Water meter keeps running. When I turn off the water supply to the hot water tank the needle on the water meter stops, does that mean that I have a leak in the hot water pipe coming out of tge tank.


Yes you have a leak on hot pipe or TP overflow tube.
Put ear against pipe to listen for sound of running water.
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html#listen
If TP valve goes into drain line, check if water is running down TP overflow tube.
Check each faucet for leaks.
If pipes are under slab, put ear against each faucet to determine which faucet is closest to broken pipe.

Mar 23, 2013 | Water Heaters

1 Answer

Heater comes on with water


please see the next step:
he pilot light may be out or may not stay lit. There may not be enough hot water, or the water may be too hot. The water heater may leak or be noisy, or the hot water may be dirty.
A problem with your water heater may be due to overwork, not mechanics. If your water heater holds less than 15 gallons per family member (tank volume is stamped on a metal plate affixed to most water heaters), consider a larger unit or staggering your use of hot water.
Drain a hot water tank:
  1. Turn the gas-control knob to off and close the gas-shutoff valve.
  2. Close the cold-water supply valve and open a hot-water faucet in the house to speed draining.
  3. Attach a garden hose to the drain valve and run it outside to a drain. If the heater is in the basement you may need to run the hose to or through a sump pump.
  4. Open the drain valve and allow the tank to drain.
  5. Once done, close the drain valve, open the cold-water supply valve, and open any nearby hot-water faucet. When a steady stream of water flows from that faucet, the tank is full; close the hot-water faucet.
  6. Once the tank is full, turn on the gas and relight the pilot.


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Jul 31, 2012 | Heating & Cooling

1 Answer

Fixed leaking faucet, now handles leak at the base & the water pressure is low


No, air can't get trapped in there. I don't think you did anything wrong. It sounds like the valve or internal parts are worn more than new washers take up for. Tightening down the valve just reduced travel for valve to open fully. Can't think of a fix; where's that joe da plumber?

Nov 23, 2011 | Plumbing

1 Answer

I have a wireless Grohe shower that keeps dripping hot water constantly


Your mixing valve(faucet) has a bad valve and is allowing the hot water to bypass and leak thru shower. You should replace the bad mixing valve or the faucet to repair and stop the leak.

May 10, 2011 | Grohe Home

1 Answer

Have a pegasus shower faucet an it knocs every time you turn the hot water on in any part of the hause


Sounds as if you have air in the pipes.
To solve this you will need a piece of hose that will fit over the ends of your hot and cold faucets in the kitchen (or other lowest faucets in the house) - fix it on tightly with hose clips and open both faucets fully. Wait 5 minutes or so before turning off hot water faucet first.
If that hasn't cleared it repeat the process but after 5 minutes turn on your shower faucet and see if it splutters as the air is forced out. You may have to do this with other faucets in the house too. Close each one off once the water runs evenly without air in it.
If that doesn't work you will need to drain your hot water system down completely. Turn off water supply at the hot water cylinder (or rising main if you have a tank-less system) and open all faucets until water stops flowing. Close each faucet about 2/3rds then turn on water supply again. Wait for each faucet to get a slow but steady flow. Going round each faucet in turn gradually open each on a little bit more until all are running fast and even and all the air has spurted out. Now go round each faucet in turn closing each one down a bit at a time until they are only dribbling a small amount. Turn all faucets off.

Feb 17, 2011 | Plumbing

2 Answers

How do I, myself, fix a faucet leak?


Faucets in general operate either with a one handle valve stem or valve stems that uses small pieces of rubber to precent the water flow. In a single handle model this is usually caused by mineral deposits building up and the valve not being able to fully restrict the flow of water. The fix here is usually a new stem. On models that use a two handle system and do have replaceable valve stems one must get a repacement seat from a hadware store and reinstall the stem. In extreme cases the valve body may need to be ground internally and will require a professional. If you do not a have replaceable stems than the only alternative is a new faucet. I hope this assists you and thanks for using Fix Ya.

Oct 29, 2008 | Plumbing

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