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Old 08-17-2012, 08:40 AM   #1
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S-Trap to horizontal drain


I just had a new kitchen sink installed and the drain in the sink basin is offset to the left of the drain line coming out of the wall. The drain line coming out of the wall comes out horizontally for about 12 to 16 inches, then there is an s-trap to the sink drain tail piece. So far this setup seems to be working, but are there any issues (code, or potential syphoning). I know that syphoning can occur when an s-trap goes into a vertical drain, but does that still occur if it drains into a horizontal line?

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Old 08-17-2012, 09:01 AM   #2
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S-Trap to horizontal drain


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Originally Posted by chronojosh View Post
I just had a new kitchen sink installed and the drain in the sink basin is offset to the left of the drain line coming out of the wall. The drain line coming out of the wall comes out horizontally for about 12 to 16 inches, then there is an s-trap to the sink drain tail piece. So far this setup seems to be working, but are there any issues (code, or potential syphoning). I know that syphoning can occur when an s-trap goes into a vertical drain, but does that still occur if it drains into a horizontal line?
Need a picture. If it goes into a horizontal trap arm it is not a S trap.

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Old 08-17-2012, 09:01 AM   #3
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S-Trap to horizontal drain


if the drain line comes out of the wall it should be hookde up with a p-trap. i don't know how you could hook an s-trap to a drain coming out of the wall.
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Old 08-17-2012, 09:58 AM   #4
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S-Trap to horizontal drain


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if the drain line comes out of the wall it should be hookde up with a p-trap. i don't know how you could hook an s-trap to a drain coming out of the wall.
S-trap + P-trap.
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Old 08-17-2012, 11:53 AM   #5
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S-Trap to horizontal drain


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Originally Posted by DannyT View Post
if the drain line comes out of the wall it should be hookde up with a p-trap. i don't know how you could hook an s-trap to a drain coming out of the wall.
If someone put a 90 looking up at the end of the trap arm- stuck an s trap on it to the sink tailpiece.....

S traps are a nono.
I'd like to see a picture of what you have.
Can you lengthen the sink tailpiece so a normal p trap will connect to the trap arm? (may need a horizontal offset to get it to line up to the drain)
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