Another useful preformed conduit is the twin walled plastic piping used in
water or heating applications. It comes in 1/2", 3/4" and 1" diameters and
about 6' - 10' long. It's also has a range of angle bends that fit
externally if required. It is very pliable and more importantly lightweight.
I used 1/2" on both sides. Fixed it tight up under horizontal Door frame on
both sides, applied a little flox a then 2 layers of bid.
The same practice was used around front screen surround to give a conduit to
overhead panel wiring.
The strength it added serves well on door frames and also a sort of rollover
strength to front screen frame.
Regards
Gerry
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