Moving toilet drain to existing vent?

[ehaney]

Is there such a thing as an "easy" plumbing project?

I'd like to move the toilet in my bathroom about 10". The existing vent seems to be in the right place. This is why I thought it might be "easy".

Here's a picture from the crawlspace.

http://www.tailwindcafe.com/images/travelogue/upload/178.jpg

The vent is the pipe on the left and the toilet is the pipe on the right. The pipe on the left turns 90 degrees and leads out of the house (about 1' below the T). The pipe that you can barely see on the bottom goes to the kitchen.

So my question is: Is there any way to turn that T 180 degrees so that the 90 degree elbow is on the left instead of the right? Then my vent would become the toilet drain and the toilet drain could become the vent. Or is this stuff impossible for a DIYer to modify? (I'm guessing the latter is true.)

How about removing all of the plumbing at the 90 that leads out of the house and re-doing it all with PVC? There's probably only 20' of pipe in the whole house (not including the vent stacks).

I've soldered some copper together, but I've never done anything with DWV. Am I getting in over my head?

Thanks,
/eric


Oh. This is why I want to move the toilet 10". I'd like to frame in a "cove" on the wall to the right and put the back of the toilet in it.

http://www.tailwindcafe.com/images/travelogue/upload/179.jpg

I still can't believe they did that.

[DUNBAR PLUMBER]

Yes. What you are describing is possible and when you install that main vent, use double offset 45's instead of 90's. This is not code to use 90's as it is flat venting under 42".

[ehaney]

Here is a CAD drawing of the proposed "fix" to this problem. Does anyone see any egregious code violations? I'm a little concerned about the spacing of the water heater to the new wall. Is 5.5" okay?

http://www.tailwindcafe.com/images/travelogue/upload/180.jpg

Any other problems anyone can see that I might run into? I'd like to at least have an idea of what they'll be before I tear down the walls.

I plan to use two 45deg fittings in the attic so I can use the same vent hole.

Thanks for your advice/opinion/help - isn't the internet GREAT?!

[DUNBAR PLUMBER]

Looks fine. You are on the money using the 2X6 wall for the venting, water lines.