Tank Liner Alternative idea

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pybyr

Minister of Fire
Hearth Supporter
Jun 3, 2008
2,300
Adamant, VT 05640
wish I had thought of this before

the "home-made tankage thread" (which is probably the most elegant DIY thing I have seen yet in this genre) got me thinking about liner-based tanks, even though I'd previously steered away from them and invested in a honkin' big mass of 409 stainless instead

EPDM liners seem iffy, over the long haul, if you really want to max temperatures, which maximizes BTUS per gallon

I suddenly had a "DUH" moment, too late

I have previously used a material called Tu-Tuf for insulating vapor barrier. It's, as far as I can tell, the same thing as PEX pipe, except in a big flat roll.

It's hard to cut with anything other than a sharp knife even when you try. it's wonderfully goof proof stuff in its basic durability. bombastically bomb-blast proof in an unassuming way.

if PEX works for pipe, why not for a liner?
 
Does it actually have the properties of pex? Bear in mind that pex is cross linked polyethylene, the x-linking is what allows it to withstand pressure at temperature, unlike black well tubing (high density polyethylene).
Is it flexible enough to be folded into a tank?
 
Tu tuf is too thin. Anything under 30 mils thick is going to be susceptible to permeation, especially at the water temps you see in a wood boiler tank.
Water will not leak, but rather permeate through the plastic.
 
Tom in Maine said:
Tu tuf is too thin. Anything under 30 mils thick is going to be susceptible to permeation, especially at the water temps you see in a wood boiler tank.
Water will not leak, but rather permeate through the plastic.
Click to expand...

Tom nice to see you here in the boiler room, lots of things going on here.

Steve
 
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