Hi all,
Long time since I was here, and now need some advice! We have just built a year-round cabin, and I need to do rough-in plumbing before the floor insulation is put in. Cabin is on posts, and is about 2' above ground where the toilet will be. Will only have toilet, sink, and kitchen sink. My question is what I need to do underneath the cabin, where I will have the 3" toilet discharge, and the sink discharge (1.5", 2"?) meeting below the floor, and then into the ground to get to the septic. Do I need to have an insulated box or something around the pipes that will be exposed to very cold air (Maine) in the winter? And, perhaps more importantly, what kind of insulation will I need when I bring my water supply in? (thinking 1" black poly from our house)....

Is there a standard way this gets plumbed?

Thanks!

Insulation only slows freezing, will NOT prevent it.

Unless the piping has 'some' source of heat it WILL freeze.

If the cabin is occupied, think heated, then you want the piping exposed to said heat but insulated from the cold.

If the cabin is unoccupied/unheated then the water piping requires draining 'for the winter'.

Think in terms of a 'pipe chase' insulated on the cold side but NOT insulated on the warm side.


Packy may chime in.

WOW.. you realize the one inch poly will need to be buried at least four feet deep. then where it turns up to come into the house the only way to keep it from freezing is heat tape. (as long as central maine power doesn't fail on the cold nights).
i'm thinking the drains may need the same solution.
the only product i would consider is frostex

[www.nvent.com]

Thanks. This has been a bit of my worry.... This is gonna turn out to be much more difficult than I had envisioned....



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