I called up a local company that deals with spray foam insulation. They've done underground boiler lines for apartment buildings before, so it's not an entirely new process to them. The guy quoting me told me to space the lines 2" apart and space them 2" off the ground with foam blocks. He's going to put 2" all the way around and in between. The quote came in at $9-$10 per foot (or $720-$800 for my 80' underground). Add that to the cost of the 1-1/4" PEX and I'm looking at about $11.50 per foot insulated not calculating the cost of me renting the trencher. Is there any well-made pre-insulated 1-1/4" pipe that comes in around that price?
Got a spray foam quote
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heaterman
Minister of Fire
Not that I have found and that's why nearly all of ours go in that way. Just make sure he's spraying closed cell foam. You should be all right if your guy has done that type of work before. He'll know what is needed.
Chris Hoskin
TarmSalesGuy
in my limited experience, good quality pre-fab stuff comes in at around 50% more than that. Does that sound about right to others?
Chris
Chris
I buried 150' of 1-1/4" thermopex today. I paid $13.00/ft for the line last year. Thermopex is two 1-1/4" lines inside a 5" diameter pipe surrounded by foam insulation. Hard to work with but started digging at 10:00 am,installed thermopex,cored 6" hole in foundation,ran a 150' of 1-1/4 conduit,pulled 150' of CAT 5E wire,backfilled, cocktails by 6:00pm. Need to go to bed.
Como
Minister of Fire
woodsmaster
Minister of Fire
I'm considering buying from this company:
http://www.outdoorfurnacesupply.com
I don't know what the freight would be on this, but the price before shipping looks pretty good:
http://www.outdoorfurnacesupply.com/watts-insulated-pex5-wrap-length-p-433.html
I'll be using 1" pex for my outdoor boiler, for a 75' run.
For me it's within driving distance, so I can pick it up in person and save on shipping. They also have a lot of other parts I'll need (like a heat exchanger for my furnace plenum.) They usually sell nice sidearms, but currently their supplier is on back order. Their website doesn't even show products if they don't have them in stock, so I was surprised when the sidearms disappeared, and they emailed me and told me their supplier is sold out for at least a couple months.
Again, I haven't used them, but so far I know of no reason why I shouldn't, and the prices look pretty good.
Scott in Penfield NY
http://www.outdoorfurnacesupply.com
I don't know what the freight would be on this, but the price before shipping looks pretty good:
http://www.outdoorfurnacesupply.com/watts-insulated-pex5-wrap-length-p-433.html
I'll be using 1" pex for my outdoor boiler, for a 75' run.
For me it's within driving distance, so I can pick it up in person and save on shipping. They also have a lot of other parts I'll need (like a heat exchanger for my furnace plenum.) They usually sell nice sidearms, but currently their supplier is on back order. Their website doesn't even show products if they don't have them in stock, so I was surprised when the sidearms disappeared, and they emailed me and told me their supplier is sold out for at least a couple months.
Again, I haven't used them, but so far I know of no reason why I shouldn't, and the prices look pretty good.
Scott in Penfield NY
I don't trust the drain tile to remain water proof. The insulation will absorb water if it gets in.
91220da
Member
3rd season running Maxx R around 1 1/4" pexal pex. Running about 50 feet from garage to house with less than 1 degree of heat loss between wood boiler in the garage and the oil boiler in the basement. If I remember correctly it was about $9 per foot at that time without the pex. Bought from This Warm House in Mansfield PA http://maxx-r.com/
I'm hoping to buy a Waste Oil boiler to heat my soon to be purchased 60x90 warehouse,,and then bury some piping 125 to my house... It's all driveway, so the foam needs to be 5' down, and inside a corrugated sewer pipe
Here' the price of the piping I'm thinking of using
Barrier Pex 1 1/4" 20' @ $56 = $2.80 p ft
" " 2" 20' @$115
Corrugated Black Roll 6" 100' @ $140
" " Stick 8" 1' @ 6.50
" " " 10" 1' @10.50
So that means 2x 1 1/4 PEX inside an 8' sewer pipe would cost $12 per foot, + the foam truck I'd have to pay to have on the job as I'd lay this into the 5' deep trench.
The CleanBurn Waste Oil Tech also mentioned that it's imperative to have a return temp above 140f, as the boiler will condensate below 140, and form acid on the heat coil. CB provides for a mixing valve to mix in hot outlet water to increase the return temp to avoid this prob. Think heat loss in the trench, or a very cold house on a very cold day.
I'm also going to consider a work bench oil storage tank. They offer a 250 gallon bench, but I'm thinking closer to 1000 gals, depending on cost. Solid work bench, and the oil's inside the building
Here' the price of the piping I'm thinking of using
Barrier Pex 1 1/4" 20' @ $56 = $2.80 p ft
" " 2" 20' @$115
Corrugated Black Roll 6" 100' @ $140
" " Stick 8" 1' @ 6.50
" " " 10" 1' @10.50
So that means 2x 1 1/4 PEX inside an 8' sewer pipe would cost $12 per foot, + the foam truck I'd have to pay to have on the job as I'd lay this into the 5' deep trench.
The CleanBurn Waste Oil Tech also mentioned that it's imperative to have a return temp above 140f, as the boiler will condensate below 140, and form acid on the heat coil. CB provides for a mixing valve to mix in hot outlet water to increase the return temp to avoid this prob. Think heat loss in the trench, or a very cold house on a very cold day.
I'm also going to consider a work bench oil storage tank. They offer a 250 gallon bench, but I'm thinking closer to 1000 gals, depending on cost. Solid work bench, and the oil's inside the building
If you go to Central Boilers website you can use the dealer locater. They manufacter Thermopex and can cut pipe to exact lenght you need. Probably less than $15.00/ft.
If you go to Central Boilers website you can use the dealer locater. They manufacter Thermopex and can cut pipe to exact lenght you need. Probably less than $15.00/ft.
What's the temp limit of Thermopex? I just need the bare pipe, I think, or maybe spray the insulated pipe? BTW, your post appears TWICE!
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