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How does this look?

Posted by weedyacres (My Page) on
Mon, Apr 22, 13 at 21:25

Here's the photo. Narration follows. Looking for feedback on whether we did this right.
 photo 101_2487_zps6881edd0.jpg
 photo 101_2486_zps5f40b3ec.jpg

This is underneath a bathroom floor. Fixtures, L to R are tub, toilet, sink. You're looking at drain and vent lines. Vent runs to the left and up the wall behind the tub, drain runs down to the right, eventually to the sewer line.

Follow-Up Postings:

RE: How does this look?

I'm not sure I'm looking at this correctly. Can you add labels and pointers?
It looks like you have an S-trap, (center of top pic) which I don't believe is permitted in new work.
What sizes are the pipes? I don't see where you have 3" or larger coming down from the toilet.

RE: How does this look?

Here are the annotated photos.
 photo plumbing2_zps60c4a96b.jpg

 photo plumbing1_zps6aa33321.jpg

Comment about S-trap duly noted and forwarded to Mr. Weedy.

RE: How does this look?

Your vent line is not allowed to go downwards. Neither is it allowed to connect in-line with the waste line. You probably need another vent pipe closer to the toilet.
I believe you need an on-site plumber to design this properly for you.

RE: How does this look?

The vents are all sloping up and to the left, the drains down and to the right.

Are you saying the toilet drain line needs to have its own vent?

RE: How does this look?

What you've identified as the toilet vent drops down at the left end, then goes horizontal before going vertical.
That drop to go under the joists is not allowed.

RE: How does this look? addl info

Copied from the late Lazypup's answer to another post-

"The vent pipe must rise vertically from the drain line. There may be no horizontal run of the vent line until it reaches an elevation of 6" above the flood level rim of the highest fixture served by that vent. "

Based on the locations of your fixtures with respect to the drain line exit, I'd suspect that you will need another vent.

You need a qualified plumber to design a DWV system that will pass inspection in your locality.

RE: How does this look?

late Lazypup? Tell me you don't mean literally! He has been very helpful on a couple previous projects.

BTW, in this jurisdiction, permits/inspections aren't required for DIY work on existing houses. That's why I'm seeking help here. I appreciate your comments on the venting.

I take it that horizontal runs, even if gently sloping up, are still considered horizontal runs?

RE: How does this look?

Yes, sadly we were informed several months ago, by a friend of his, that Lazypup passed away. He is missed.

And, yes, a run is still considered horizontal even if gently sloped up.

RE: How does this look?

OK, I went and did some internet research in earnest on vents, and here's the revised setup.
 photo plumbing3_zps51d60f35.jpg

 photo plumbing4_zpsed4fbe49.jpg

I'm not sure the tub vent is ok doing an elbow upwards, since it's upstream from the drain. I couldn't find any diagrams that show a vent going like this, so I'm hesitant, but Mr. Weedy argues that it's no different from a T upwards. There's not room to Tee directly up from the drain line, to the right of where the p-trap section turns right into the drain.

So if this isn't kosher, what's an alternative way to vent the tub?

Anything else wrong here?

RE: How does this look?

That toilet drain should be 3" direct to the sewer/cistern/septic, looks to be 2" only, not good, will plug up regularly. Here in Ontario it must be 4" dedicated line without tie ins, don't get me going on that I didn't write the code. Not sure if it is 3" no point of reference.

No "S" trap from the tub, why a "S" trap? Need maximum hydrostatic pressure to make that turn. OK for a dishwasher, washing machine but without additional pressure not good.

After looking at original pics there have been changes made, no? Now I don't see a "S" trap and the toilet drain looks to be 3".

The vent looks fine from here other than it should be 3", it looks like the drain is 3" with a reducing fitting to 2", continue with 3" to the roof.

Off topic, why no plumbing inspection required where you are? Methane gas can be deadly. I don't get it. I have seen some DIY stuff that can be lethal. I could write a book.

I know you are working on a 60K cottage, don't over think this project in my humble opinion. I see your thread on moonscape plaster to smooth, you are going to drive yourself bonkers.

I hope this helps Weedy.

RE: How does this look?

Toilet (and main) drain is/was 3" in both versions. Yes, we removed the S-trap and the horizontal vents.

My research said vents need to be at least 1/2 the diameter of the drain pipe, which would be 1 1/2". Did I misunderstand the code, or is it different in this case for some reason?

Don't know why no permits/inspections. We're in a small town.

And we're not going to touch the moonscape plaster. The Old House folks talked us out of that. :-)

RE: How does this look?

That looks fine to me. I don't think the 90 on to the vent hurts. Because of joist configuration I have run a small run of horizontal (2') without problem before and it's passed code here.

RE: How does this look?

I should add Weedy, my 2" then goes to 3" up and out the roof. I have never seen an 1.5" rubber roof vent boot. I'll tell you what if they are available from where you get your materials from I imagine it may vent

Sometimes a good hardware store clerk knows as much or more about what will work than some plumbers do. Ask your supply guy or gal your pics and the vent size.

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