Tank Liner Alternative idea

[pybyr]

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?

 

[Hydronics]

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?

 

[tom in maine]

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.

 

[Grover59]

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

Steve