I have a delta 1400 shower valve that I had to replace. The existing one was full of sediment. When I put everything back together water just comes out the tub spout as if the valve wasn't there. When I look at valve/cartridge there is an ever so small gap between the metal casing in the wall and the cartridge. I assume this is why I am having water come out below, even though I don't quiet understand why it is full pressure. Is there a trick to getting this cartridge back into place? I've pushed it in quiet hard and it won't go any further. This is what I am working with.
Plumbing – How to replace a Delta 1400 shower valve cartridge
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Here is what I found. I went to the hardware store and located two of the replacement valve cartridge made by Delta. Reading the back of them I found that one was for faucet made after 2005 and the other was for faucet made before 2006. Being that my house was built in 2000 I went for the one made before 2006. I then replaced the after market cartridge with the new one from Delta and now life is good.
The after market product does not mention anything about manufacturing year so I am thinking it is for newer versions of the Delta 1400 Series shower faucets.
It looks fairly standard to me. I'd contact Eljer & see if Danco, Brasscraft or someone else has put out a replacement that fits. Otherwise, have you tried to rebuild the old valve with O-ring replacements & such? Eljer should be able to direct you to the right kit for the valve.
On the other hand, soldering will be difficult & could cause a fire in the wall if you're not experienced. So, either get a Plumber or get a SharkBite Threaded connector so you can just cut the old valve loose & wrench in the new one. I updated the picture to show the correct valve that has screw shut-offs or stops (the silver screw).
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Best Answer
Ok, I found the problem. Answering it in hopes that it helps someone else someday... The cartridge I bought in the store was in fact the wrong piece. While the white part that is further away from the wall was the correct type the blue part was model UPG 7 vs UPG 2. It looks almost the same but the intake parts are slightly offset.