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A modest 3 bed and 2 bath home will be built in a cold climate with a winter design temp of -20 F.

As in many houses today, the common spaces are one large flowing series of volumes, and the...

A small new house will be built over a 4-foot deep crawlspace foundation, and the mechanicals are planned to go in the space under the stairs. By doing that, we can permit a little better room for...

I can tell from reading specs how these two pipe types differ. My question is about usage.

The pic shows the plan view of the underslab waste and soil drains in a house being built. The line...

No definition needed for "street." I know what one is.

But how in the world did the name come about? I've posted the Q on other forums, and struck out.

Forget code for the moment, and examine this, clipped from another site:

4 in. soil pipe offers a more efficient way to dispose of solid material, but the introduction of low-volume toilets and...

Here. I rotated the model so you can see a little better.

How is the lav drain, with the re-vent going up and over to the 2" vent coming off the 4" below the toilet, redundant?

Is the revent...

Haven't done this yet, but planning it. The pic shows an "x-ray" view of below-the-walkout-basement-slab drain and waste lines.

The 4" main at the R in the pic takes a 90 to run over and pick up...

The sewer lines come through the slab and the mains run under it and out to a septic tank.

Planning new construction with basement bath and washing machine.

Proposed arrangement of trenched-in DWV is attached. Sweeps, combos, and wyes will be used where required, and vent fittings will...

The attached plan shows an area of a walkout basement, slab on grade, in which there is a full bathroom and an adjacent washer/dryer closet. As can be seen, all fixtures on this floor drain through...