You are not logged in.

Dear visitor, welcome to SPRINKLER TALK FORUM - You Got Questions, We've Got Answers. If this is your first visit here, please read the Help. It explains how this page works. You must be registered before you can use all the page's features. Please use the registration form, to register here or read more information about the registration process. If you are already registered, please login here.


Starting Member


Sunday, July 3rd 2011, 8:06pm

Question about building a manifold

Hi all,

The line from my water meter is 3/4" so I am also using 3/4" for the sprinkler main line.

Question: if I build my own manifold with 3/4" pipe and tees, will this reduce the pressure/gpm too much? I will probably have 4-5 zones.

I ask because it seems that the tees will reduce the pipe diameter at those locations since they are insert fittings, thus reducing pressure/gpm. Just not sure how much reduction and what the impact would be.



Supreme Member

Posts: 4,533

Location: Metro NYC


Monday, July 4th 2011, 8:31am

sight unseen, you should upsize to one-inch plumbing

Rate this thread