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Old 10-01-2012, 11:31 PM   #1
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ABS maximum distance and angles?


We want to build a bathroom on the other side of the house. Is there a maximum distance that a 4" ABS pipe can be extended? The task will involve two 90 degree right angles. Is that too many angles?

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Old 10-01-2012, 11:39 PM   #2
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ABS maximum distance and angles?


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We want to build a bathroom on the other side of the house. Is there a maximum distance that a 4" ABS pipe can be extended? The task will involve two 90 degree right angles. Is that too many angles?
if you run out of fall 1/4" per ft rise its too far...picture would help

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Old 10-02-2012, 11:39 AM   #3
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ABS maximum distance and angles?


in most places 3 and 4 inch pipe can run at 1/8 inch per foot pitch. use

45 degree bends to make your turns. for a bathroom you only need 3

inch pipe.
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Old 10-02-2012, 01:42 PM   #4
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ABS maximum distance and angles?


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if you run out of fall 1/4" per ft rise its too far...
I read on the internet that for 4" ABS pipe 1/8" per foot is standard. Between the start/finish there is approx. 2 feet height difference.

The distance is approx. 50-60 feet total, with two 90 degree turns. That's about 10 feet - 90 degree turn - 30 feet - 90 degree turn - 10 feet.
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Old 10-02-2012, 02:59 PM   #5
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ABS maximum distance and angles?


at 1/8 inch per foot you would need 7.5 inches in 60 feet. use a 45 and a street 45 to make the 90 degree turns, if you have the room you can put a short piece of pipe between regular 45's. if any are outside corners use a wye and a street 45 and put a clean out in the end of the wye. put a clean out at the end of the run. is this in a crawl or a basement.

Last edited by DannyT; 10-02-2012 at 03:06 PM.
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Old 10-02-2012, 05:22 PM   #6
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ABS maximum distance and angles?


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is this in a crawl or a basement.
crawl
varies between 2-5 feet of space between the ground and the floor joists
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Old 10-02-2012, 08:05 PM   #7
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ABS maximum distance and angles?


If you read it on the internet it must be true.

1/8" per foot here is only legal outside of the structure which includes porches, overhangs, decks, etc...etc......


Also in regards to change in direction : Horizontal changes of direction in excess of 135* require a cleanout.

First you need to decide whether or not you already have a cleanout, which direction it's intended to service, and how many degrees change of direction are on that line after the cleanout. This will tell you where you will need cleanouts.


At 1/4" per foot you should have plenty of room, assuming that your measurement of 24 inches is from the bottom of the joist to the top of the pipe.
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Old 10-02-2012, 10:30 PM   #8
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ABS maximum distance and angles?


Where did the 1/8" come from....I have never heard that.....maybe it applies to drainage for a yard.....
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Old 10-02-2012, 10:34 PM   #9
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ABS maximum distance and angles?


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Where did the 1/8" come from....I have never heard that.....maybe it applies to drainage for a yard.....
UPC- 4" may be ran at 1/8"ft, fixture load is decreased by 20% and is subject to AHJ approval. Inside or outside. It is usually excepted and pretty standard practice in my area when grade is an issue

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