Connect to the to the hot water supply for hot water heater.
Pex in attic.
Put a bypass before the water heater and run it into the attic.
Yes the cold water is hot in the summer very hot in fact due to the heat of the attic.
Insulation only slows the time when it will freeze after the water is not running through the pipe.
Sometimes they have been insulated makes very little difference to the temp on a july or august afternoon.
It is important to insulate pex pipe in an attic particularly in cold weather areas.
Safe for potable water pex is the red and blue flexible tubing that s used to make gentle bends around obstructions in your attic and is perfect for adding water supply to hard to reach locations.
While pex does not ordinarily burst in the cold the water in the pipes can still freeze.
Cross linked polyethylene tubing better known as pex pipe has revolutionized plumbing installations in new home construction and remodeling.
Yes rodents will chew absoultely eveything they step on.
Pex type is forgiving when it freezes as far as breakage but insulating an exposed water line does little to keep it from freezing.
Foam is used most commonly and generally works well.
Such as at night if the attic temp is 15 deg f.
Working with pex tubing install pex in attic plumbing with pex save on plumbing do it yourself plumbing run pex tubing how to unroll pex tubing.
A wet rag should easily wipe away any visible dirt or debris.
Pex is available in a variety of lengths from short 10 foot pieces for small repairs to rolls over 500 feet long which are used to install a home s entire water supply system.
Pex cpvc poly back in the day even copper in the attics etc.