Remote P trap

[Matteu1]

Hello all, long time reader 1st time poster. I'll do my best to explain, however, I think the picture presents the situation best. I'm renovating a downstairs bath which has a soffit that houses the plumbing, etc. for an upstairs full bath. I want to change the configuration of the bath drain to avoid having an even larger awkward looking soffit.

Waste and overflow has the drain below the tub shoe: drain to street 90 to 12" horizontal run (will slope @ 1/4"/ft) to 90 elbow to tail piece to trap to steel covered no hub fit for pvc and copper. The photo is a bad angle but the drain does wet vent within 5' or less of the trap.

The question...aside from the nightmare of trying to snake 2 90's before the trap and the sludge build up in the horizontal run are there any apparent problems...code violations? Would a long sweep 90 before the tailpiece even help? Any other recommendations?

Many thanks!

Matt

 

[voletl]

Someone correct me if I'm wrong but that is a running trap which is against code.

 

[frodo]

wth? is that tee hooked to the bottom of the tub ?

i see no vent

nothing about that set up is legal

 

[Matteu1]

I thought a running trap/U trap is where the inlet/outlet are on the same plane. Need to re-check code but I thought there was a prevision that states the max horizontal offset from drain to trap is 30"?

 

[frodo]

.........................

 

[Matteu1]

Yes, the setup is based on your second image. Back to the drawing board if that's not allowed. I bought that as a kit :/

 

[frodo]

code also says every trap shall be vented

looks like the tub bdrain is hooked up incorectly is it ?

 

[Matteu1]

I can't online the two. The vanity for the downstairs bath is on the left side and will be too close to the lav.

 

[frodo]

does that wall ine up with the upstais wall ?

if it does, drill a hole down from up stairs and a hole up thru the top plate of the the othr wall

so that they are lined up understand ?

 

[frodo]

the vanity has a 4'' kick space does it not ?


plumbing 2 stories..ist you drill your holes down from the 2nd floor
then run the pipe to the hole

we need a vent hole to run that pipe to

 

[Matteu1]

1st image...soffit could be moved left which is what I'm trying to avoid since this is the entrance hallway to the bath.

2nd image...ignore copper pipe in the front. The pipe with all those connections is the sink. Original bath and sink joined here and connect to the stack all the way in the back. I assumed the original setup was wet vented via the sink or stack.

 

[Matteu1]

1st pic, sorry

 

[frodo]

no vent on tub

 

[frodo]

.......................

 

[Matteu1]

Is that because the drains must independently connect to the horizontal wet vent and not at that funky junction?

 

[Matteu1]

Revised, downstairs wall is dotted. This is the upstairs floorplan.

 

[Matteu1]

Another pic

 

[phishfood]

If the sink has a vent, then you are OK according to IPC. As you mentioned, you can offset out of the inlet of the trap, and I seem to recall the number being 30". Is there a reason that you can't turn up underneath the overflow of the tub, and use a standard drain kit? It would make any drain cleaning that might need to be done on the tub a lot easier.

 

[phishfood]

One thing that would concern me, though, is transitioning from tubular copper to IPS plastic. The ID of the two is somewhat different, causing a reduction in size in the direction of flow.

 

[Matteu1]

The sink is vented. I may be able to use a standard tub/overflow kit. Need to check the pitch to make sure the extra length wouldn't push me below the joists. I used the offset kit to reduce the horizontal run.

There's a diameter difference for sure. Only positive I could see is it goes from small to large.