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Author Topic: Type of pipe for ASHP  (Read 887 times)
chris wills
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« on: February 20, 2019, 02:23:45 PM »

Hello, I currently have plastic pipe in foam insulation running from my ASHP to my buffer tank. Over the weekend we are having some work done to the house and digging up around the area of the pipe. I would therefore like to bury it, something I wanted to do for some time, its really in the way and always at risk of damage.
Its about 10m long and will be down about half a metre.

Should I just use the plastic pipe (28mm) and speedifits or make a connection with copper pipe or use something else?

Any recommendations please?
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A.L.
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« Reply #1 on: February 20, 2019, 03:23:15 PM »

hello,

2 x1m plastic at least for ASHP flow and return end to reduce/eliminate vibration.
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chris wills
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« Reply #2 on: February 21, 2019, 06:28:29 AM »

Sorry Iím not sure way you mean.
I have a 10m run
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Iain
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« Reply #3 on: February 21, 2019, 07:00:27 AM »

Hi
My mate used something similar to this

https://www.polypipe.com/housing/pressure-systems/pre-insulated-pipes


This was the one

Iain


* IMG_1634.PNG (543.99 KB, 2048x1536 - viewed 279 times.)
« Last Edit: February 21, 2019, 07:05:05 AM by Iain » Logged

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chris wills
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« Reply #4 on: February 21, 2019, 01:03:27 PM »

Thankyou for the information
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chris wills
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« Reply #5 on: February 28, 2019, 09:10:44 PM »

I did look at this pipe but its rather expensive.
What would you recommend, copper pipe in foam insulation or the speedifit pipe in insulation?
My issue is I would like to put the pipe underground and bury it, either just over the foam or in a pipe?
Whats best?

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Iain
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« Reply #6 on: February 28, 2019, 11:07:13 PM »

Hi
If it were mine I would use plastic, in insulation, in a protective pipe. Either both insulated pipes in a single larger protective pipe or run 2 side by side.
I would be tempted to get some of the underground corrugated pipe or see if you can get the 2 pipes and insulation in some 110mm rigid soil pipe.
Just make sure the insulation can't get wet or it will loose some of the insulation properties.

Iain
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1.98kWp PV (11 x Sharp 180 and SB 2.5)
20 x 65mm Thermal and 180ltr unvented
Powervault 4Kw - G200 Lithium-Ion (LiFePO4)
9000ltr rainwater storage   Plymouth
chris wills
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« Reply #7 on: March 05, 2019, 08:57:25 PM »

Thats good advice Iain, I suppose the hardest part is keeping them dry in the pipe, maybe seal the ends with some gap foam filler?
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