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Forums > Green Building Technologies > Appliances, Lighting and Kitchen/Bath Fixtures > Subject: PEX water supply

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JellyUser is Offline
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Posts:496
07/28/2009 4:34 PM  
I am about to pour the slab for my new house, and have some PEX questions regarding water supply distribution (not talking about radiant heating).

In my PEX research I keep finding essentially 2 methods: home-run (where each fixture has a hot and cold line run directly from a central manifold), or trunk-and-branch, where the fixtures are hooked up in sequence and sized down at each fixture for pressure (the way that most copper systems are installed).

But I was wondering if a hybrid of home-run and trunk-and-branch might not make sense. In other words using a home-run system for all the hot water distribution, and trunk-and-branch for the cold water distribution. It would seem you would have the home-run benefits of energy efficiency and less wait time for the hot water, but also the trunk-and-branch benefits of fixture pressure and less material costs for the cold water. Has anyone ever done this? Am I overlooking something obvious that would make it a bad idea?
ICFconstructionUser is Offline
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07/30/2009 8:12 PM  
I don't see why you couldn't mix it up, I have heard of it too. It has been common practice to run dedicated lines to just the showers and the "trunk and branch" everywhere else.
Brad Kvanbek - ICFconstruction.net
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Forums > Green Building Technologies > Appliances, Lighting and Kitchen/Bath Fixtures > PEX water supply


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