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Thanks! Another (somewhat related) question. I will be creating a network of horizontal 1.5" vent piping at the ceiling level. When branching off horizontally on the vents, should I be using WYEs, or are sanitary tees permitted? Ivan

I have glued up my plan for the WC branch, the WC vent, and the start of a branch going off to the left for the shower/lav/laundry. I am venting the WC through the wall behind the toilet, all vent sections are on a 45 angle or completely vertical. Any comments would be appreciated. Thanks, Ivan.

Good point, I was thinking of that. How close to the closet flange can I put my wye for the vent connection? For a normal trap, I need to be 2x pipe diameter away from the trap weir, but I am not sure how close i can be for a toilet, as the trap is in the toilet, not part of my installed plumbing.

Additionally, I think the OBC allows for a 1.5 in vent for a toilet:

Ah yes, I drew the wye direction backwards for the shower, sorry. For the toilet vent, I plan to use a 3x1.5x3 fitting, with the takeoff angled up 45 degrees, similar to this, but without the horizontal section (all vent lines will be either 45 degrees or vertical).

Thanks for the feedback. Assuming I make the following couple of changes, is this acceptable? Green lines represent proposed changes. I appreciate all the feedback, thanks again! Ivan

Hi All, I'm continuing my basement plumbing project, and I'd like a review of my planned plumbing routes under the slab before I start cutting and gluing. A few notes: 1) I'm in Ontario, so I would appreciate any feedback as it pertains to the Ontario Building Code (OBC). 2) All fixtures will...

Excellent, thanks for the advice. Getting a little late in the night tonight, but I shall glue it all up tomorrow! :)

My proposed final solution. I haven't glued anything yet until I get a little feedback, but I think it is legal. Thanks as always!

After looking at the geometry in the space I am working, I am considering doing this with the trap. I think this is ok, but I have a few comments/questions: 1) I can put up to 135 degrees of direction change in the pipe from the shower drain to the trap, I think. 2) I want to avoid drilling 2"+...

Thanks for the feedback! And as far as the direction goes, I want to ensure that the sweep goes towards the drain, and not towards the trap, correct? The way I look at it, the sweep should be angled such that any water that might get in the vent pipe has a smooth path back to the drain.

Ok....I think I have a plan now based on my latest drawing. One final question though: when connecting the vertical dry vent to the horizontal branch drain, can I use a horizontally placed sanitary tee, as shown below: I understand that generally sanitary tees are not permitted when...

So if I head straight towards the dry vent location, pickup the *completely vertical* dry vent and then head towards the 3" stack, my route (looking down on the horizontal projection) looks something like this: -I shouldn't need to swivel the P-trap at all, I think I can come straight out -I...

Ah, I think I understand now...the trap arm stays horizontal (or sloped down at 1/8 to 1/4 per foot) and then ties into the vertical vent connection. I can achieve this...but it would mean that my horizontal drain would zigzag quite a bit (instead of going straight out of the trap, I would head...

This is where I struggle a bit....in my configuration, there's going to be about 4.5 ft of very slightly sloped vent pipe until it can go vertical. But my situation isn't unique I think, just about every shower pan venting has *some* length of vent pipe that is pseudo-horizontal as the pipe...

So I worked a little more on this tonight, and I came up with a solution for my issue. I have rotated the dry vent location to be on a 45degree angle, and moved it as far away from the trap as practical. Here's pictures of my dry-fit installation: In each picture, Red is the dry vent line...

The joists are 2"x8" only, and do not allow enough depth for the 2x1.5x2 Sanitary tee + elbow, without dropping the trap down very far. Below is what it looks like if I try to dry vent without dropping the trap down, there isn't enough room for my sanitary tee + elbow: Green: Top/Bottom of...

I dry-fitted everything and took a picture...nothing has been glued up yet. I'm trying to avoid a direct connect dry vent, as that makes the trap sit down too far, and means I need a bulkhead. Can a shower not be wet vented?

Hi all. I'm in Ontario, so I'm looking for advice relevant to the Ontario Building Code. I have a shower drain connection that is about 5' from the trap to a 3" wet-vented stack. This isn't a conventional stack, but rather it would be tied in below a toilet, the configuration I would like to do...

I can feel the oscillations through the PRV....the whole plumbing system oscillates, haha. I cleaned the screens, and as I mentioned, I tried adjusting the pressure...adjusting down (to an unknown pressure...I didn't have a pressure gauge with me) eventually resulted in a setting seems to have...