Zigzag or two flipped 45s in a drain line. Is this OK?


Fee

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I have a sink drain line that has two 45 flipped to create a zigzag angle before empty into the main line. Is this an appropriate angle to have in a drain line? I need just the slight angle and it is a tight situation so I am trying to figure out my best plan. Of course proper slope is taken into consideration as well.

Screen Shot 2020-11-13 at 11.41.11 AM.png
 
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Fee

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Correct. This would be the end of the drain after leaving the sink trap.
 
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Why is there a need for the offset? Is there an obstruction that prevents hooking the horizontal pipe directly to the vertical pipe? The fewer joints, the less chance for future leaks.
 

Fee

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Yeah, sorry my illustration isn't great. Basically the horizontal pip runs along the foundation wall. It takes a 90 down, still along the foundation wall. The zigzag would actually be coming out from the foundation wall towards a horizontal pipe that it would need to connect into. So limited space between the foundation wall and the horizontal pipe, which is why I need just the smaller zigzag offset angle to connect the two.

Another option probably could be this. The horizontal pip would run along the foundation past the stud, take a 45 angle away from the foundation and then continue horizontal. Then it would just take a 90 sweep down to the horizontal pipe. This is a 1-1/4" PVC DWV pipe as well.

Screen Shot 2020-11-14 at 11.29.14 AM.png
 

Fee

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Instead of relying on confusing illustration, it is probably easier to actually look at the real thing! Thanks again for your thoughts.

This would be my second option that I last posted, although I feel like my first idea is a better one. That ball valve would be moved higher and out of the way, so that isn't an issue. The 45s going down connect directly into the vertical pipe.

IMG_0050 copy.jpg


Here is an image of my original idea. I wasn't sure if the 90 circled would work or if two 45s would give a better angle. After the circled joint, there are two 45s leading to the vertical pipe.

IMG_0051 copy.jpg
 

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