Burying Pre-Insulated Tubing

Sounds like a lot of trouble just to drain the snot out of a condenser.

Local knowledge is missing here, as well as the reason to insulate a waste water drain line.

What is your role in this?

My first thought was to direct the customer to the tubing supplier, unless that's you.

Still seems a bit much.

Condensate from a air compressor will need to be filtered. As it will have oil in it. That will clog the drain line. The oil forms an emulsified brown goo of oil and water that will clog the line. Standard filters for the compressor condensate does not remove it all.

Sounds like he concerned about freezing. I would run PVC pipe with elbows used for pulling wire. And pull plastic tube down it for the condensate. That way if it does clog up from the goo or freezing it's an easy fix.

A better choice of material entirely would be the insulated poly pipe system commonly used for running water from outdoor wood fired boilers to houses and barns- it's designed for direct burial and can be easily cleaned out, with far less risk of kinking than SS tube. It comes as a pair of poly tubes inside a 4" (or so) corrugated flexible drain type pipe, with insulation filled around the inner piping. Might even be cheaper!

Just use Hydrodare pipe. Specifically designed joint less, and in any run length you want. And it is widely used for drainage and water piping. No trouble in direct burial in any soil type.

http://www.goodwins.ie/c-758-hydrodare-polythene-pipe-fittings.aspx

Thanks everyone for your input. As it turns out, the tubing is to be electric traced and the customer has decided to use conduit to run it. I assume they have also worked out the issue of the bedding and back fill since that will need to be considered with the conduit as well.