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c/commercial-plumbing•terryr46terryr46•6d ago

Watching a crew try to use residential PEX for a 4-story office building in Tempe

The pressure drop across those long runs will be a nightmare in two years, and I've seen it fail inspection three times now. Anyone else had to fix this after the fact?
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2 Comments
angela_jackson
Actually, the new PEX-A stuff with the bigger inside diameter handles long runs way better than the old stuff. If they oversize the main lines a bit and use a good manifold system, the pressure drop isn't that bad. Some inspectors are just stuck on copper for commercial jobs.
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ruby561
ruby5616d ago
Upsized the mains and it passed last year!
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