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Old 10-22-2007, 08:56 AM   #16
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Need Help with PEX replumb


Don't believe it would cause any problem...all manifolds say not to exceed the flow of the 1" pipe. The Wirsbo brand say you have to use the ProPex system...so just be aware of that.

I WISH I had purchased a different kind of manifold, the one I used has a 3/4" pex fitting going into an 1" barrel with 6 valves. I have 3 of these linked together. It's not pretty, but here's a picture of what I did. So far it hasn't caused a problem with flow requirements. If I were to use this kind again, I'd chop off the 3/4" PEX fitting on the end of the barrels and solder them together. I know of many have used the plastic manifolds successfully...but I guess I prefer copper.

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Old 10-22-2007, 09:12 AM   #17
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RippySkippy:

That's some set up!! Are they all 3/4" ??

I notice you have all stop valves on the lines. Are they necessary? If you want to change a faucet, don't you need to drain the entire system, or do you just disassemble the line then re crimp?

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Old 10-22-2007, 10:27 AM   #18
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It's called over kill. I like to have complete control over the happenings in the house. In addition to the manifolds, I have a stop at the faucet supplies as well. In the event that I have to replace a faucet, I can shut it off from the basement or under cabinet...which ever is more convenient and depending on it's priority. I'm going to error on the side of being able to isolate any potential problems where ever I can. If I have a catastrophic leak on a run, I can shut that run down, with out affecting the rest of the house.

Each line off the manifold is 1/2", the barrel on the manifolds are 1" and the connection to the supplies (cold and hot) are 3/4". Some day I'm going to insulate all the manifolds, I'm still working on some stuff in that portion of the house...so it'll have to wait a bit longer. Also, I'm going to take short piece of pex with a plug crimped in to cap each un-used run...just a little insurance.
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Old 10-22-2007, 11:44 AM   #19
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Quote:
Originally Posted by RippySkippy View Post
It's called over kill.

I like to have complete control over the happenings in the house. In addition to the manifolds, I have a stop at the faucet supplies as well. In the event that I have to replace a faucet, I can shut it off from the basement or under cabinet...

Some day I'm going to insulate all the manifolds...

Also, I'm going to take short piece of pex with a plug crimped in to cap each un-used run...just a little insurance.
Wow. Whatever makes you happy as my mother would say to Her Grandchildren!!!

Did you ever work for NASA??

What about my previous question about mixing output sizes?

Quote:
Can I gang together two manifolds of the same size copper pipe (using a large diameter say 1-2 inches would be better?)that would have different sized pex terminals i.e. mostly 1/2" but at least one with 3/4"?
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Old 10-22-2007, 12:08 PM   #20
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RE: NASA -- that's funny!

I don't have specific reference to what your asking to do. I'd call the pex supply folks and inquire with them...they'd have a better answer than anything I could dredge up. Let us know what you find out.

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