I have 2 seperate shower units in my stall. Plumber piped one valve correctly, but piped one with shower pipe exiting out of the tub port on valve. I seem to have a bit of water hammer or spool play in cartridge now.
Is it OK to pipe to shower from tub port (lower) on valve or should it be redone to go out of shower port (top) on valve?
Thanks in advance.