Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I am having a new shower built along with a new bathroom altogether...

I selected Grohe hardware and wanted to know if I should go with the 1/2" or 3/4" since I will have a rain shower, hand held unit, and 4 jets.

Will I be able to have the plumber hook everything up with the existing 1/2" pipe or do I need to upgrade to 3/4"?

share|improve this question
up vote 4 down vote accepted

I would upgrade to the 3/4" pipe. With as many fixtures as you have, you won't have good water pressure with more than one of them on at a time.

share|improve this answer
keep in mind that if you feed a 3/4 in line from a 1/2 inch line the effect will be negative. The 3/4 must go back to the main line, as any 1/2 will be the limiting factor. – shirlock homes Jan 7 '11 at 18:36

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.