I am changing the location of my shower ant toilet and need help with doing this correctly. I have attached a picture showing the before and "after". The toilet had a 90 degree sweep connecting it to the 3" horizontal line. Can I use a 45 degree connection instead?

Hi needtovent:

The way you have it drawn up will work perfectly.

You can use the wye combination fitting like in your drawing on the left or the wye fitting you presented in the image on the right... just can't use a sanitary tee fitting on the horizontal to pick up a drain line.

MARK

Would it be OK to use a 3" 90 degree with a 2" heel inlet at the connection to the verticle vent to connect the shower drain?? This would be in lue of the way I drew it on the left. Im guessing no since it would make it too easy :)


Sorry I meant to say this would be instead of the way I drew it on the right

Correct... at least in my area those fittings are no longer allowed. Be clear, however, that each state has different codes and it could be that the side inlet fitting is allowed in your area. Takes a simple call over to a local plumbing inspector to find out... ;)

MARK

I have to say that reconnecting the plumbing is MUCH more difficult than I had planned for!

If you need help as you go pop back anytime. We may not be here all the time but we check every 3 or 4 hours so we will respond with an answer... OK?

MARK

Ok... another question about the picture above... The old system had two clean out plugs, one just up from the 3" bend in the 3" vent pipe and one on the 2" vent pip going to the sink. Are these required?? With the way I want to do the design it would be sticking out of a visible wall... any thoughts Thanks

Not required, but nice to have in the future should a clog occur. In my area we are required to install cleanouts at the base of a waste stack, at the foundation wall, at every change of direction and if on slab at every pipe coming out of the concrete slab.

If you can keep the cleanout on the 2" great. If not, install a PTRAP with a union fitting so you have a full size cleanout should you need it in the future.

You can do away with the 3" cleanout and if needed could snake the drain from the roof or even pull the toilet and snake the drain that way.

MARK

Is the 3" line not considered a change in direction since it is only a vent at that point? Fro a vanity with two sinks do you need to have two separate drains or can you link them together and use the one drain? I originally wasn't going to get this inspected but figure I should.. and therefor have become a little more concerned about how I do things :/

Yeah, not a change of direction... I've never seen a cleanout on a vent stack unless it went into a concrete floor, of course.

For a vanity with 2 sinks you should pipe a 2" pipe up and come off it with a 2"x1.5" double TY fitting. Stub out with elbows to both sinks and attach a ptrap to each sink. The 2" can reduce to an 1.5" vent from there or it can continue on 2" and connect into the vent stack at 42-48" off the finish floor.

Finally, if you plan to have this inspected spend a couple minutes and find out if you can even pull a plumbing permit...most towns/cities won't allow it. If you finally do pull the permit be sure to consult the plumbing inspector to be sure he agrees that the 3" cleanout can be done away with.

Each state has its own unique codes...most are very similar, but I'll tell you, some of the codes are really different, never mind a plumbing inspector that wants thing done, "HIS WAY"...:rolleyes: I'm glad to help you with basics of plumbing/plumbing design, but you need to check locally before investing your time and money in anything I tell you... OK?

I would hate to see you have to remove anything on account of any misinformation received here!

MARK