I put in a new delta shower valve and when I run water to the tub, water comes out of the shower as well. Water constantly comes out the shower even if the tub diverter is not pushed down. How do I fix it?

If your new Delta single handle shower valve won't shut off, it could be due to an issue with the valve itself or with the installation. Some possible causes include a misaligned handle, debris in the valve body, or a faulty cartridge. It is best to check the installation instructions and ensure that everything is properly seated and aligned. If that does not solve the issue, you may need to contact Delta customer service for further assistance or consider hiring a plumber to diagnose and fix the problem.

Not usually, but there should be an inverter or other unit to activate the shower. Often it is in the tub outlet and blocks the tub outlet to force water up the shower pipes. If there is no such or if it is just not working you may need to run the piping up to a sufficient height and then back down to the shower head to create enough pressure resistance if it is as you say, requiring a specific height of pipe to get a specific back pressure. But there also needs to be a mechanism to force the water up the shower pipe. Look up Delta on the web and get a phone number as there will be someone at Delta that can fully advise you about this.

Hello Mark
is the water still coming out the bottom when you pull up the lever to make the shower come on ? if it is then the tub valve is bad . if little or no water come out of the bottom then the head is going to be clogged and you have have buildup inside the filter /screen which could be located in the end of the hose at the head or inside the head unit itself. .

You will have water coming out of the shower head when you have really good water pressure. There might be more water volume coming out through the valve then what the tub spout can handle and in turn sends the water up to your shower head. When you fill your tub try turning the water only half way on not at full pressure, does this keep the water from coming out of the shower head? Most likely your valve has a 3/4" supply line while your shower head and tub have only a 1/2" supply line. Sounds like you have more volume to the valve than what the tub spout can handle. You might consider one of two things: 1) you can put a water regulator on the main supply line going into the house to lower your pressure, or 2) change out the supply line to the tub spout, increasing it from 1/2" to 3/4". Let me know whats going on.

the diverter valve is probably bad. put a new one in. the valve cuts off the water to shower, while running bath water.

You can cap the lines at the tub faucet to rule out tub faucet. It maybe mixing there.

Faucet may be bad also the safety stop will alow you to change water temp it can be tricky to adjust water temp.

check the tub faucet the pull lever maybe slightly faulty causing back pressure in line and pushing water up to shower head --u may have debris in tub line causing partial blockage -or u have alot of water pressure coming in and it is to much for the lines to handle and it is pushing up to shower head

You might have to replace the tub spout, because the divirter is not closing all the way. A new one will stop water from getting by it.

The only possible explaination is that the water is finding it easier to go up than down. Water is lazy, just like me. ;)

Use an allen key to remove the tub spout. It's underneath and awkward. Once the allen key is loose, the spout just slides off. Try running the water. This may solve your problem and all you'll need is a new tub spout. If not.....

Turn the water off to the house.

Use an allen key to remove the handle.

Use a phillips to remove the trim plate (2 screws). Cut the silicone around the trim if it's there (which, in a proper installation it shouldn't be, but...)

Unscrew the nut (usually chrome) holding the cartridge into the brass body of the valve. The cartridge pulls straight out. Check for restriction in the ports of the cartridge itself. Check for restriction in the line going down to the tub spout. If you can't find anything, replace the cartridge.

Reassemble & Enjoy!

well the Diverter is not working it dose not matter the distance. when applied it should shoot the water to shower or tub if not working will come both.