Gary wrote:
Hi all

We are doing a basement reno and need to replace the old city water
supply line which is currently running under the ceiling joists
(perpendicular). We have to either run some sort of flexible pipe
through the joists or figure out how bend copper to get them into the
joists. This is all because of a ceiling height requirement where we
are unable to have a dropped ceiling. Can't even spare a 1/2 inch
because of code...

Are there any good options for flexible plastic supply lines now? What
other things should I be considering?

Thanks
Gary


You can (fairly) easily pull 3/4" Type L soft copper tube
thru bored holes in joists. Rent/beg/borrow/steal a rt angle
drill for the job. Get slip-on foam insulation too, so you
don't have condensation dripping on your new ceiling.

PEX plastic tubing is another option, but is not as readily
available and the terminations are not familiar to DIY-ers.

One last point: In an older home, the water service line
*may* be in use as a grounding means. Not just the electric
service panel, but as an equipment ground for boxes, recepts, etc.
[It should be said that this use as equip ground is no longer
permitted, but you abandon any such grounds at your peril.]

Ask the inspector for advice regarding bonding and grounding.

Jim