Hi, Steve -
On Mon, Dec 26, 2011 at 10:00:00AM -0500, SteveW wrote:
> I looked at that website, Ben, and it appears that PEX is designed for water
> systems (presumably, potable water) and it doesn't mention anything about
> it's use for sanitation hose. Which brings up two questions in my mind.
Searching for "PEX 'sanitation hose'" pops up a number of links. :) One
of the first ones describes PEX(A), PEX(B), and PEX(C) as being
appropriate for sanitation use, with pros and cons (mostly, degree of
flexibility) listed for all three.
Please do note, by the way, that I'm not an expert on this stuff by any
means, and am not arguing for it as one. It's just that everything I've
read so far, plus my own small bit of experimentation with it, plus the
fact that the entire building industry is shifting to the stuff as
quickly as they can, add up to a very positive picture for me, so it's
what I'm going to use from here forward.
> The website specifically cautions against using it with any supply "...where
> the system contains...ferrous corrodible components..." .
That's specific to potable water systems. "HEPEX" (i.e., PEX used for
hydronic systems), for example, doesn't have that kind of restrictions.
I seriously dobut that PEX used for sanitation would either.
> Now I'm not sure
> whether there are any "ferrous corrodible components" in human waste
[grin] Not unless you've been chewing 10-penny nails...
> but it
> doesn't sound to me as if its manufactured with any odor containing elements
> as marine sanitation hose is.
The problem with the usual marine hose is that it's rather porous. PEX
isn't, any more than steel pipe is, so there shouldn't be any concern
with odors. Again, no guarantees, but - well, most holding tanks these
days are made of polyethylene...
Ben
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