Replacing 2 handle shower valves. dont seem to fit back in the body. they are the exact same replacments as old ones. any tricks? should the valve be open or closed when being put in? replaced valve seats also. water continues to run out of the tub spout. What have i missed? the rubber washer pieces do not seem to fit back into the valve body

two possible causes. 1- make sure the valve body is installed with with shower mark on the valve body facing up. 2 - if you used pex pipe and fittings to stub out for the tub spout this will restrict the flow sending water to the shower, '' change out pex pipe and replace with copper or galvanized pipe

Replace the rough in valve

unruly is right....if your shower valve is the model that has those isolation valves built into it...If yours does, you will have no problem seeing them once the cover plate is off...If there is no sign of any bulging fittings on each side of the valve, with a slotted drive stem in the middle of each one looking back you, directly in the eye, then you have to take a different approach to solving the pressure problem.
That approach will cost you the price of a new shower head...because that's your only remaining option, (short of hiring a plumbing contractor to install a couple of flow reducing fittings or isolation/metering valves on your supply piping)(a five hundred dollar bill will buy that option), available for a FIY project. A new head can be purchased for under 10-12 bucks....just make sure to take your old one with you when you go to buy the new one....this will identify the means in which your shower head attaches to your shower arm pipe. It wouldn't hurt to pick up a small jar of pipe thread compound or Teflon tape too. Some shower head re-attachment applications require a pretty snug fit to prevent leaks at the connection joint. You see, there will be more pressure on that connection now, because the new shower head you bought has a restrictor built into it, thus your water pressure issue is resolved, but that added resistance also causes higher pressures in the shower arm and piping supplying it inside the wall. That is why you should use thread compound or Teflon tape on the threads when you re-install the new head. ...And also, the threads on the shower arm have been used once already, which deforms the threaded area slightly, making for a loose-er fit when re-used. The Teflon tape can take up the space by adding a couple extra wraps on the threads. And before attaching the new head, paint a light coat of pipe thread compound on top of the Teflon tape, (brush it on in a clockwise direction only...the same direction you rolled the Teflon tape onto the threads)(and take care not to get any pipe thread compound inside the shower arm....the flow orifice in your new shower head will be sensitive to any debris that try to pass through it)(it will be prone to clogging)(and it will continue to slowly clog as time goes by...another reason to do the in-line valve option,.... and require being flushed out occasionally), and that will surely give you a good tight seal. Not to be too commanding, If I could Just suggest one more thing.....Please use a smooth face wrench, (like an open end wrench or adjustable cresant wrench) to tighten chrome finished fittings and pipe. If you have to use channel locks or pliers in the place of a strap wrench, get one of your best wash cloths and wrap it around the pipe or fitting before gripping it with the jaws of the pliers. If you have a spouse...you might want to keep the wash cloth thing between us guys, but it really needs to be a cloth wit a thick layer of material, otherwise the pliers will pinch right through and be useless....if you have a leather shammy....that would work the very best...
Well I lied....there is one other option, if your real attached to your present shower head, you could purchase an in-line shut-off valve and install it directly behind your shower head, on the shower arm. It would have to be an in-line globe, (best)-needle, (good)-or ball, (okay), valve type of configuration, so you could adjust the flow to a more suitable volume/pressure. Because the new shower head will not be adjustable and you will have the pressure reduced to the set gallons per minute setting that the head was designed and manufactured to flow at. Get a nice chrome plated brass bodied in-line valve, with a globe type valve design and install it just up stream, (directly behind), your shower head and this will be the best DIY option you could take. I would definitely opt for this method to reduce my water pressure out of the shower head....because it not only allows me to adjust the pressure to just the way I like it, but it also makes me a proactive part of conservation of our fresh water supplies, by allowing me to easily turn off the water flow while I lather up with soap, then easily turn it back on to rinse.....This option may cost more around 30 bucks, and it may prove to add a degree of difficulty toward finding the right in-line valve, but I think it will pay for itself in the short/longish run. If you have a "mom and pop", locally owned hardware shop left in or around your town/city, I would suggest looking for the "best" in-line valve there. A shower head in-line metering/shut off valve...chrome plated brass body, 1st-globe valve configuration...2nd-or needle valve....lastly-ball valve configuration, it must have a stainless steel stem and handle/lever for easy operation, and the connection configuration must be 1/2" FIPS inlet side and 1/2" MIPS outlet side for best results, mechanically and aesthetically. You find yourself this exact valve and it's a done deal. Or just get a new head and bing bang bam...pressure problem fixed.....just like that. good luck and may the Plumb Gods smile upon your efforts.....

ps....peel off the excess Teflon tape and wipe off the excess pipe thread compound when you finish attaching you new head/in-line valve. Beautiful...pss...there are a few web based retailers that sell hard to find fittings and valves ...like the in-line valve I've suggested...I can only remember a part of one of the retailers names....McMasters and???. that should get you there.

Sounds like someone did not remove the plastic valve assembly before soldering the valve body to the copper piping.
That or the valve body needs cleaned out. It is common for debris to get knocked lose when doing installations on old plumbing.

As you look at your valve on the right you will see a large screw fitting.inside this fitting is a temp/ pressure balance spool. it has failed for some reason and needs to be replaced. On both sides of the valve are 2 smaller screws. these are the water shut off valves. turn off the water and remove the larger screw fitting. remove spool and replace. Hope this helps.

Is your shower valve a single handle. If so I would reccomend you change cartridge. To do this shut off water to valve or house. Remove center cover on valve handle,most of these are just friction fit so gently pry off with knife point or small screwdriver. Remove handle by pulling straight out,then remove chrome cover that fits around outside of valve. Ther is a small copper retaing clip that holds valve in place. It should have a small hole in tab that is on top of valve. Grasp this with pliers and pull up to remove. Then remove cartridge by pulling on cartridge stem. If it's doesn't come out you can get a moen cartridge puller at hardware store. Remove old cartridge,install new one and reinstall retaing clip. Reinstall chrome cover and handle.Turn water back on and try shower valve to see that cold is on the right side. If it's not remove handle and turn center stem 180 degrees.This will change cold side to right. Put handle back on with cover and you sould be done. Hope this helps. Thanks

I would recommend that you replace cartridge. To do this shut off water supply to tub or whole house as needed, Remove valve handle cover,remove handle screw and pull off handle. Remove chrome cover from around valve body. There is a small brass or copper clip that fits on front side of cartridge to hold it in place. Carefully remove this clip as you will need it for reassembly. Grasp end of valve stem with pliers and gently try to pull cartridge ftom valve body, If it is stuck you can purchace a moen cartridge puller at most hardware stores. Follow directions on how to use puller, remove old cartridge,install new one . install clip moving cartridge slihtly to proper position so retainer clip will slid into position. replace chrome cover and handle and screw and cover. Turn water back on and you should be done. Hope this helps. Thanks

Moen makes a cover plate to fit over the 2 handle holes. I don't know the number off the top of my head but I have used alot of them. It alows you to cut a large enough hole to gain access to the old valve and replace it with a new single handle.

it must be the same model number,most models come in different colors and styles.

take a mesurement of tap head across then go to local hardware store and have a look around it might be better to change hole set . thank you for useing fixya please rate me