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Thanks. I must have missed the flat vent reference the first time I scanned the photos. There it is on page 12: "flat vent can be used where additional vertical clearance is required". He shows both a shower and bathtub photo of a flat vent in use. The bathtub photo is hard to see but the...

if I use the standard stack layout shown below, the vertical vent with san tee requires the use of a med 90 which brings the exit below my 3" main line (assuming I maintain a 0.25"/ft slope on it). The med 90 is not to scale in this diagram. In reality, I am only a couple of inches too low...

Yes, all my horizontal vents are sloped so no water will collect. What I will do is add a cleanout to the horizontal vent line just in case it does clog. However, even if it were clogged, isn’t there a ‘trap primer’ on the toilet fill valve that will keep the trap filled and the gases out...

cwhy2, I'm still in the rough-in stage so there is no waterfall yet. Actually the tub isn't even in yet, I was working the 3" main line when I ran into the height problem this weekend. I'll try to post some photos when it's done or once the walls and shower areas are floated.

Here is a more accurate diagram of the solution I thought would be acceptable: To install the standard stack layout it appears that I'd have to a drill 1.5" (or larger) hole through the girder for a horizontal vent into the space between the joists. Doing that might allow enough room to...

Hi hj, thanks for responding. Although I could move the trap over, I don’t believe that would help. Perhaps I'm not understanding your thought. The real limitation is a girder holding the joists supporting the tub. The top of the 90 bend exiting the trap is touching the bottom of this...

Great. Thank you so much Terry. Just so I can learn a little from this, it would be nice to know what "using waste fittings below the flood level of the fixture" means. Since I'd think the flood line for a toilet is at the rim wouldn't all fittings be below that? Or does this mean that...

DWV layout question (with figures) for sunken tub I'm hoping that by adding figures to show my situation it will be easier for folks to respond! Please, any comments are appreciated.

Terry, Thank you. The tips are quite informative! However, all his photos show the vent traveling vertical or what looks like 45 deg then vertical. He does not say anything about a flat vent. Perhaps the diagram below may help explain my dilemma. Due to space limitations I must run the...

Tried a more difficult post in the general forum with no luck (https://terrylove.com/forums/showthread.php?41681-DWV-layout-question-for-sunken-tub). So I’ll try here with the second part of my venting question. Which of the following venting layouts for a WC is permitted/recommended...

DWV layout question (with figures) for sunken tub Hi everyone, I have an older single story home on a raised foundation. Over the past 10+ years I've been replacing the old steel piping in the crawlspace under the house with equivalent ABS runs following the same DWV layout that existed...

So do you cut a square notch on the edge of the two studs so that everything is exposed on the inside corner of the 90? Will the inspector allow that vs circular holes in the center of the studs? If so, I didn't understand that from the first post. That would certainly make everything a lot...

Hi jimbo, Thanks. Yes, normally I always do both sides at once. Perhaps I should digress to soldering method here. Is heating the pipe something I've been doing wrong all these years? I thought both the pipe and fitting had to be uniformly hot enough to melt the solder for a good joint. It...

Hi Terry, thanks. Do you mean to solder one side of the 90 on, let it cool, then clean/flux the other side and put into a hole large enough to fit the bend, with the cleaned/fluxed straight segment inserted afterward? No sure what you mean by "this case I put the heat right on the fittng."...

Hi. I've been sweating copper pipes for many years now with good success. Usually when I'm in a tight space such as near a stud and/or drywall I can just use a fireproof cloth to protect the wood and get the job done. Now for the first time I'd like to pipe between one wall and another with a...