Thank you for your question, and I am sorry to hear that you are experiencing an issue with your Delta faucet. If the showerhead leaks out when you have water coming out of the tub spout without the diverter pulled up, the faucet is experiencing Shower Rise. There are a few steps that can be taken to see where the Shower Rise is occurring.
1. Make sure the valve body has the word 'UP' on the top of the body.
2. Between the valve to the tub spout, the measurement should be between 8"-18".
Anything less than 8" or more than 18", you will have shower rise occur.
3. There should only be one 90 degree angle (elbow) between the valve down to the tub spout.
4. Between the valve down to the tub spout, make sure you are only using 1/2" copper pipe or 1/2" galvanized pipe. PVC or PEX piping has a smaller inside diameter which pressurizes the water up when it builds up. You can use PVC or PEX piping anywhere else in the install but between the valve down to the tub spout, you should only use 1/2" copper or 1/2" galvanized piping.
5. If these are all installed correctly, the last step we recommend would be to flush the valve body without the cartridge in. Turn off your water at your shut off valve. Take the handle and set screw out. Unscrew the bonnet nut. Pull the cartridge out. Make sure there is nothing left inside of the valve. Turn on the water at the shut off valve for a few seconds to flush the valve of debris. Turn off the water from the shut off valve and reinstall all parts. If you should need anymore assistance with this, please contact our Delta Customer Service line at (800)345-3358. We are available Monday-Friday, 7am-7pm, CST and Saturday, 8am-5pm, CST. You may also email at firstname.lastname@example.org.
Date published: 2018-05-19