[DMan7]

Hello,

I recently plumbed in a new shower, but my friend says my trap closely resembles an S-trap, which I realize is not allowed.



In the foreground is a 4" main waste line. This has a 4x4x2 T, the T part pointing up at about 45 degrees. From there, you can see the a 2x2x2 T, which is connected to an 90degree elbow, and subsequently a trap, with drain, then a 2" vertical pipe which goes up to the shower (vertical shower pipe has red markings on it)

The other end of the 2x2x2 leads away to a 2" vent line (vent line has black printing on it)

Can anyone here comment if this is an allowable setup?

[Milo Dolezal]

It will work... but: you used SanTees . I would use Y's. Water flows better through Y's. The "S" trap situation may be present. You should have 6" horizontal pipe between trap and another 90.

[massplumber2008]

Like Milo said... you really needed to use wye fittings (code requires it) for all waste line connections AND further, the ptrap should come off the drain line at center of the drain line... not rolled up above the 2" sanitary tee like you have it.

Again, like Milo said, it will work, but trap may siphon over time and cause issues for you (odors)...

Anyway... let us know what you think...

Sorry... MARK

[DMan7]

Thanks to you both for your replies. Sigh - cut it up and start over. Why do they sell these crazy curved fittings if wye fittings are code. ARGH!!

[DMan7]

Can I do a running trap and put the trap further away? How far can I go?

[massplumber2008]

*Ouch*...

That had to be hard to wake up too...

The Sanitarty tees can be used on the vertical for drainage and on the horizontal as vent connections...

Lots and lots of codes. Looks like a tight space you're working in... huh?

Hey, let us know what the final ends up like... ok?

Check into venting a little online so you understand how that vent needs to connect into the shower drain so it is an effective vent.

Let us know if have questions... I'm off to work now... back tonight. Others here next couple hours!
MARK

[DMan7]

Ok, here's another photo from the top. I probably should have shared this one earlier.



So first of all - are we certain this existing setup would not pass muster (before I cut it up)?

If it does not, then here are 2 plans to resolve. Can you comment on its validity?

Plan A
A. Cut it all up.
B. Delete #3 (90* elbow)
C. Rotate #2 (2x2x2 T) to the left 90 degrees to take place of the deleted elbow
D. Lower #4 and 5 to join with 2 with a short straight section.

Question - Is there a way to achieve this without cutting it all up?

Plan B
A. Cut it all up
B. Rotate #1 (4x4x2) 45* towards foreground so the T part points straight up
C. Rotate #2 to the left 90*
D. Delete #3
E. Join 4 to 2
F. Install 90* elbow to top of #2 pointing towards 6
G. Delete 6 (45 degree)
F. Join what was 6 with 2 with a short straight section and complete the vent path.

Works?