I do need that 3" vent becauseIf your jurisdiction allows "horizontal wet venting" and you use the proper fittings (long sweep 90s, combos, and if on the first floor, accessable clean outs for every change of direction of 135 degrees and every run of greater than 5' requires a cleanout) then yes. And you do not need that 3" vent unless that is the only bathroom group in the house.
I see from your note off the page that you are thinking of an offset closet flange. There are no code approved flanges for a reason (from what I recall). For the most part they will cause trouble. Sioux Chief makes a flange w/ S.S. ring that is just a 45 deg. elbow built in to the flange. That is fine to use but requires hacking a joist likely to the point that you need to double up the joist b/c of the notch induced weakness.
So I can tie in my WC to a lower elevation then my LAV and SHWR on my soil stack . The 3" vent is the only vent leaving the house so it is necessary . I do agree with you offset flanges are scabby and are just asking for trouble I figured out how to make it work without it .If your jurisdiction allows "horizontal wet venting" and you use the proper fittings (long sweep 90s, combos, and if on the first floor, accessable clean outs for every change of direction of 135 degrees and every run of greater than 5' requires a cleanout) then yes. And you do not need that 3" vent unless that is the only bathroom group in the house.
I see from your note off the page that you are thinking of an offset closet flange. There are no code approved flanges for a reason (from what I recall). For the most part they will cause trouble. Sioux Chief makes a flange w/ S.S. ring that is just a 45 deg. elbow built in to the flange. That is fine to use but requires hacking a joist likely to the point that you need to double up the joist b/c of the notch induced weakness.
G search images of "horizontal wet venting" (HWV). You will get the drift.
The dead plumbers never had this kind of layout.
For the bulk of my career spanning 46 yrs., it was not in the code. We had to vent every fixture individually except for cases of vertical wet venting, like a lav into the WC vent.
An oMaybe show a floor plan and overlay existing piping in a different color.
There is a special fitting for that specific junction. Called a "Figure 8" and it comes in double (for two toilets) and left or right. See: https://www.charlottepipe.com/Documents/DimensionalCatalogs/BR-CI-MS.pdf page 16
This is not for amateurs. And, all the fittings below that floor must conform to the exact particulars of vents for each fixture not being a part of that stack. The stack is the drain ONLY, the vents are parallel and separate!
Not likely what a residential home would have.
What doesn't meet code with this the LAV is horizontally wet venting the SHWR and the WC is vertically wet ventedCongratulations at trying isometric drawing. The original drawing was not portraying much that I could understand. Unfortunately, if you are actually talking about a "stack", then yes it is vertically wet venting and NO, your plan does not comply with UPC (the code I know front to back).
How does this not meet code? The shwr is horizontally wet vented by the lav and the wc is wet vented vertically.Congratulations at trying isometric drawing. The original drawing was not portraying much that I could understand. Unfortunately, if you are actually talking about a "stack", then yes it is vertically wet venting and NO, your plan does not comply with UPC (the code I know front to back).
What doesn't meet code with this the LAV is horizontally wet venting the SHWR and the WC is vertically wet vented
How does this not meet code? The shwr is horizontally wet vented by the lav and the wc is wet vented vertically.
What doesn't meet code with this the LAV is horizontally wet venting the SHWR and the WC is vertically wet vented
How does this not meet code? The shwr is horizontally wet vented by the lav and the wc is wet vented vertically.
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