New Gasification Boiler with Underground Piping

Welcome, and yes.
Take some time & read the sticky on UG piping at the top of the page it tells all.
A product like eco flex is good, but the sprayed in place systems seem to be the best imo
If you read on this forum and heed the advice - start with good piping, good underground piping, and dry wood, you'll have a successful install.

Best of luck, Chris

Know very little, but i really like the Thermopex i have. Pricey?Yes, but it seems quite rugged. I have part of it exposed in my garage. Put your hand on it and there is no heat loss at sub zero temps.

I went with thermopex aslo, at 12.50/ft it isn't cheap, but I don't loose any heat to the ground and it doesn't care what kind of soil it runs in, mine is about two feet down and the ground and snow don't melt over it ever.
the manufacturer claims 1 degree for every 100 feet is the heat loss to expect.

Read the Sticky about my underground nightmare and the solution. I estimate the total run of my system round trip about 420'.... yes 420'. 180' underground+14' from wall to HX+14' from ground to boiler then multiply that by 2. During extended periods when the in-house fan is not running I've seen a 1-1.5deg difference between water leaving the boiler room and returning. I routinely see a 2 degree difference on my AZEL boiler room sensor. I wanted to post pictures of my AZEL temps so ya'll wouldn't think I'm blowing smoke. But my underground foam block is more than most have. That is probably a big part of it. I'm not against the Thermopex type product but my pex is in a block about 12"x12" simply because of how I had to do the trench. I need to do a post to document my undergroud performance. It's amazing. If you can foam in place you will get much more foam around your pex with the result more efficiency. If the pex is all surrounded by closed cell foam you won't care about ground water.

I need to figure out how to post a pic of my boiler room AZEL reading. Last time I called on Taxi to do it for me.