Running pex in an attic.
How to run pex through attic.
Best case imo is to use continuous runs of pex with no fittings in the attic so your plumber will have to plan the layout a bit and the pipe should be very well insulated and protected from damage so that people walking through the attic insulation can t step on it.
Insulation only slows the time when it will freeze after the water is not running through the pipe.
Do your best to separate the hot and cold lines to minimize heat transfer.
Pex type is forgiving when it freezes as far as breakage but insulating an exposed water line does little to keep it from freezing.
It may give it an extra hour before it freezes solid.
I looked in the attic and noticed that all of the plumbing that once was in the slab had been replaced by pex and was now in the attic.
I would re route it into the attic and down to each fixture.
Be sure to leave extra pipe on both ends of the run.
Such as at night if the attic temp is 15 deg f.
When running pipe from a slab to an attic use cross linked polyethylene tubing or pex instead of copper.
Pex is semi flexible which allows for long continuous runs through joists and studs.
Secure the line to the joists using clamps image 2.
Pex c is the most economical choice with a 10 foot section running 1 75 to 3 50 depending on brand and diameter.
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