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Author:
gerryg (TX)
Hello everyone,
My kitchen sink and washer line was bypassed and run along the side of the house and met up with main line about 60 ft. later. Turned out that line was running uphill in some spots and I would have to unclog it every 3 or 4 months. The line is a 2".
I decided to run a new 3" line parallel to the old one but if my calculations are right, the new line will end up deeper by the time it reaches the main if I follow the 1/4 inch drop for every foot. So my question is, can I go a little less on the drop?
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Author:
North Carolina Plumber (NC)
Here in NC the minimum slope for 3" pipe is 1/8" per foot. 2" pipe is 1/4" per foot.
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Author:
gerryg (TX)
Well Author, thanks. If it works in NC then it will work in TX. That makes a ton of difference. I should be OK then. Thanks again.
Edited 1 times.
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Author:
hj (AZ)
Just be aware that with drain lines "bigger is not always better". And in most areas, 1/4" is the minimum for 3".
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Author:
x apprentice 22 (MA)
I hope your installing a cleanout with your new drain line.
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Author:
gerryg (TX)
Well I was thinking the 3" pipe might be overkill but I already bought everything. I am planning on putting 2 clean outs, 1 at the end and the other at the turn. Was thinking about sloping the line after the turn going into the main at 1/4". From the start to the turn at 1/8". Also at the turn, is it better to use 2 45° elbows with a 1 foot piece in between or just go with a 90° elbow? Thanks again for all the advice.
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Author:
x apprentice 22 (MA)
Use the 2 45s or you can buy a long sweep 90.
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