aluminum in concrete [RE-wrenches]

[mlafferty at universalenergies.com]

Kelly K asked:

> Does the same apply to copper, e.g. for solar thermal or plumbing runs
through slabs?
> Would wrapping with rubber splice tape be sufficient to prevent
corrosion?

All:

Yes.  Copper tubing poured directly into a slab will "dissolve" in time.
It is also against the UPC (Uniform Plumbing Code) to do so.  Don't ask
me why it's OK to pour a bare copper wire into a footing for a UFER
ground..... 

For the purposes you describe, I don't recommend going to the trouble
and expense of wrapping your tubing with "splicing tape" or, more common
to plumbing, mil-spec tape.

Plumbing supply wholesalers sell a plastic sleeving material that is
used for this purpose.  It comes in rolls, dispensed from a box.  I have
seen soft copper rolls come with it already installed, but only a couple
of times.

The box is inexpensive, quick to install and intended for this purpose.
It also comes in multiple colors, like blue and orange, so you can
distinguish "your hot from your cold" after the slab is poured.

Hope this helps!

Matt Lafferty
Universal Energies Institute
mlafferty at universalenergies.com
(916) 422-9772
(916) 628-7694 Cell
(916) 914-2247 Fax
www.universalenergies.com

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