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Old 01-29-2012, 05:11 PM   #1
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waste line codes


1) When a waste line leaves the house...
is it required to go straight (perpendicular to wall) for a specific minimum
number of feet before it can change direction?

(I have the number 5 feet floating in my head from somewhere)

2) Minimum cover.
I know for a fact that the waste line is rather shallow (24" to bottom of pipe).

2a) If I make changes like adding a basement toilet
(and I can get the 1/4"/LF pitch to work) will I be held to take it all deeper?

Thanks.
---

If it matters, this house used to have a septic tank in the rear yard.
When hooked up to the city sewer line in the late 60's...
the 4" cast continued out the rear wall (@ 7" above the floor)...
then did a crazy 180 degree loop-de-loop from the rear of the
house around the side and then to the street. No back ups or problems.

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Old 01-29-2012, 06:05 PM   #2
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waste line codes


Normally it can go pretty much any direction as long as it doesnt affect a footing

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Old 01-29-2012, 06:19 PM   #3
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waste line codes


The dirwection doesn't matter. The only requorement is that there must be a clean out just before it leaves the building inside or within the first 10 ft exterior

If the drain is to high for adding a toilet in the basement you may need to add a lift pump or use a toilet with a grinder mounter on the back of the toilet. Whether you can get the min slope of 1/4 p/f all depends on where you place a toilet and the depth of the main drain.
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Old 01-29-2012, 06:59 PM   #4
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waste line codes


Quote:
Originally Posted by Plumber101 View Post
Whether you can get the min slope of 1/4 p/f all depends on where you place a toilet and the depth of the main drain.
I have enough room to do the plan (on paper using 1/4"/LF)... but it's tight!
The real difficulty comes from moving the laundry tray 16 feet away.
If I can avoid an extra 10 feet of run... that helps a lot. Thanks.
---
Looking at the picture below:
I dug a few exploratory holes last spring... about 12 feet out from the left side of the garage door is where I found the waste line to the street at 24" below the existing basement floor level.

The existing waste line exits the rear by the first window.
The new line will exit centered on the second window.
The laundry drain is sixteen feet in from the that second window.

That comes out to about 60LF of pipe (=15") before I enter the building.
Plus the floor thickness... and min cover inside... = eek!
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Last edited by TarheelTerp; 01-29-2012 at 07:12 PM.
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