Did you ever find a solution to this problem? Looks like I have a similar situation with my upstairs shower. Please let me know what worked for you. Thanks

Hi stantrob and Welcome to The Plumbing Page. At AskMeHelpDesk.com. You're responding to a 5 year old dead thread so I gave you one of your own. Look in then upper left hand corner of the first post form the date before you post, Thanks,
Please post your complaint in detail and we'll get back to you asap. Regards, Tom