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One last time on the toilet drain. Because of obstructions and space limitations, I need to have the toilet drain into the stack lower than the tub and sink. Would there be any potential problems with this arrangement, that is, having the sink and tub drain into the stack about a foot above...

In the following picture, assuming that the 'other drainage' pipe cannot be moved, which would be the better arrangement, A or B ? Thanks, Arky

I would appreciate one last review of my plumbing layout. Thank you for your previous comments. Some changes are: By repositioning the kitchen sink slightly, I was able to keep the trap arm within the max 60" length. And was able to keep the vent size 2" by locating it on the other side...

I've posted this on several other forums and so far, the B's have outnumbered the A's. The A proponents mostly say that it's a straighter shot, thus less chance of clogs. The B proponents say that the A allows too much rush of water, thus restricting the vent. I'm still 'up in the air'...

Which of these is the best configuration for a toilet drain ? Going to assume that C is incorrect because of no immediate vent pipe; that leaves A or B. Which one would be the best configuration ? Thanks, Arky

??? Do you mean that I should have an additional main drain line cleanout via a wye where the main drain exits the edge of the crawlspace ? Arky

Thanks to everyone who commented on my previous posts about my proposed plumbing. I have redrawn the plumbing and changed a number of things, so I thought it might be best to ask for new comments in a new post. Hopefully, I have everything close to kosher this time and would really appreciate...

This is my proposed arrangement for the plumbing of my retirement house. The outside walls are finished; no plumbing will be within them. Also, I don't want to go through the metal roof, hence the venting out the gable end. Although I'm in an area not subject to code, I would appreciate a...