All I could think about was what a huge pain in the ass it was going to be to rip the finished wall off to move the valve. A new shower will have plumbing for the shower valve which installs in the wall cavity behind the wall with the shower head and adjustment knob. You use one of these by locking the base onto the valve housing and screwing the central screw into the hole on the valve stem for the handle. I no longer have access to the valve itself since dry wall, thinset, kerdi, and more thinset is surrounding the valve stem coming out of the wall. Ok, all was going relatively well until I asked the plumbers to come back and put in the shower valve plate and the wall mounted faucets. For example, the Moen 104421 cartridge puller works with 1200, 1222 and 1225 cartridges, and it makes other pullers for different models. After a deep breath and closer examination, I concluded that my plumber had roughed in the valve too far forward. quote; If the valve is 1/4-3/8" too far back, will a 1" extension, then, make it stick way too far out? Plan to go into the other side of the wall before knocking out any tile. Since the backerboard is not installed yet - essentially giving me access to the valve - would it be considered better to try and move the valve, or is a … Stick the valve in an area thats nearest to the entrance to the shower so you can turn it on and bring it to temperature before stepping in. And they knew we were going to tile. In the example shower system, we are showing Delta's large overhead rain showerhead mounted to a shower arm with a bend. It's supposed to be the 'gauge' to set the depth of the valve in the wall. Is there a trim piece I can get to cover this gap between the back plate and the handle? Leaking water from the valve itself, or behind the wall of the shower can cause irreversible damage to the tile.If the tiles around the shower are loose, show mold often, or there are stains on the ceiling surrounding the shower set-up, you may want to check the plumbing and your shower valve. Quite often with walk in wet rooms we would install an on off valve at the entry and diverter in the shower, both lengthwise on one wall and the shower on the other wall. Anyway, it is now too far recessed and the handle has a piece (which I forgot to take a picture) that fits over the stem. It is … The wall trim plate attached fine but the lever was about an inch out away from the trim plate. If you have Moen faucet, you can usually find a model-specific cartridge puller for that faucet. Turns out, they put the mount for the wall faucets too far in the wall! The shower flange is a small decorative piece with an important job, it covers the hole in your wall where the pipe sticks out! 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