GBA Logo horizontal Facebook LinkedIn Email Pinterest Twitter Instagram YouTube Icon Navigation Search Icon Main Search Icon Video Play Icon Plus Icon Minus Icon Picture icon Hamburger Icon Close Icon Sorted

Community and Q&A

PEX manifold systems

drrossw | Posted in General Questions on

Is there any reason to use a manifold system on the cold supply side besides the convenience of maintenance on fixtures?

GBA Prime

Join the leading community of building science experts

Become a GBA Prime member and get instant access to the latest developments in green building, research, and reports from the field.

Replies

  1. charlie_sullivan | | #1

    There's no energy efficiency reason, but there is one other reason, which is that you avoid the effect that turning on one fixture changes the flow rate in another fixture--the classic version of that being that flushing a toilet changes the temperature in a shower. That's less of a concern than it used to be, because modern shower valves are much less susceptible to that problem.

  2. GBA Editor
    Martin Holladay | | #2

    Ross,
    Many plumbers don't like home-run systems with a manifold because they require so much tubing.

    One touted virtue of these systems is that water pressure remains stable to all fixtures when several are used at the same time.

    I think that it's fair to say that there are pluses and minuses to both approaches -- the home-run approach and the trunk-and-branch approach.

Log in or create an account to post an answer.

Community

Recent Questions and Replies

  • |
  • |
  • |
  • |