I am installing a 1/2 bath in first floor location from scratch. The location I am in requires me to take the 3" toilet drain 6' before cutting a 90deg turn 15 feet to the hook in. Venting should be within the 6' or so range. Do I need to make separate vent? Also, is there a certain angle or degree that the drain must be from start to finish (and pieces in between)? Thanks! M

A 3" drain must slope 1/4" per foot, a 4" would only require half that slope. Yes you must follow the 6' rule for the vent required for this bath.

Hey there MMM...

With any luck your area allows WET VENTING... In this case, you would run the 2" vent for the toilet within 6-8 feet of the toilet and you would run that 2" vent over to pick up the sink drain. You would stub out at about 18" off finish floor for sink and then continue the vent full size 2" to connect into 2" vent or larger up in attic or can separately penetrate the roof 2"... penetration should be between 18-24" above roof if in COLD weather area...6-12" above roof if get no snow.

Check out my drawing below to see if all makes sense... ;)

If wet venting not allowed in your area then you will need to run a separate vent for toilet and a separate vent for sink and then connect them together at 48" off finish floor and run that full size 2" as mentioned above. Let me know if you want me to draw this up..?

Let me know...

MARK

UPC allows wet venting, and from what I hear it is the strictest code around. So what code wouldn't allow wet venting?

I agree with Mark. Follow his instructions and you will have no problem.

I hear a lot of people cuss about UPC. But they need to look into the revisions of this code. They are allowing many things that they did not previously allow. And I'm very glad they are. There used to be a lot of overkill in the upc. They are starting to figure out what works without overdoing. Upc (believe it or not) is not so different( in this day and age) as most people think.

Aside from that, the code doesn't really mean much when it is the authority having jurisdiction that will make the final call.

UPC allows wet venting, and from what i hear it is the strictest code around. So what code wouldnt allow wet venting?

I agree with Mark. Follow his instructions and you will have no problem.

I hear alot of people cuss about UPC. But they need to look into the revisions of this code. They are allowing many things that they did not previously allow. And im very glad they are. There used to be alot of overkill in the upc. They are starting to figure out what works without overdoing. Upc (believe it or not) is not so different( in this day and age) as most people think.

Aside from that, the code doesnt really mean much when it is the authority having jurisdiction that will make the final call.

Wet venting may be what's called for here, but if plumbed according to Marks drawing, we still have to deal with the issue of a 15' trap arm, which is still a definite no-no under the latest adopted UPC.

MMM...

Don't get too confused about the chat amongst us plumbers... just that each state or area of the country has its own particular codes. Most agree... some don't.

The drawing I posted will work fine in over 90% of the country as long as that 3"x2" wye gets cut in between 6-8 feet of the toilet elbow... ;) In my area you would need to roll the 3"x2"wye above the centerline of the waste line as well... In Florida, for example the 3"x2" remains flat!

Good day!

If I'd plumb it as per Mark's drawing in my area, I wouldn't get signed off. Reason: toilet is not vented.

Toilet is WET VENTED Milo... :)

We all know how much you like that :)

In fact, in my post above I also said, "If wet venting not allowed in your area then you will need to run a separate vent for toilet and a separate vent for sink and then connect them together at 48" off finish floor and run that full size 2" as mentioned above"...

So you UPC guys need to read what is posted and relax a bit as I am trying to meet everyone 1/2 way when I can!. :)

Good day all...

Exactly Mark: wet vents are not allowed in my area of operation. Also, we need clean outs before pipe goes to slab.. . Sorry, I don't make the rules - I am just forced to follow them !

PS: Hey, but on the positive side: We can turn right on red light here! Try to do that in Boston !:D

We can turn right on red here too... :)

And I need a cleanout before pipes go in slab too... :) SO many details to get the poster to understand!

If I'd plumb it as per Mark's drawing in my area, I wouldn't get signed off. Reason: toilet is not vented.

Which edition of the UPC are you working from, Milo?

The latest (2006) which should have been adopted in your area by now specifically addresses the issue of wet venting in sections 908.4.1, 908.4.2 and 908.4.3.

Ahhhh! The old " MJy code's better then your code" ? "If it ain't UPC it can't work" mind set. Milo! Growler! What's it going to take to make you guys start to think outside of the UPC box? So what if ain't UPC? This page isn't about forcing a asker to conform to a certain code. It's about getting him fixed up as simple and as inexpensive as possible. Case in point. I would never advise installing a "S" trap in a remodel job, but If a asker in a 100 year old home with "S" traps has a problem thatcan be cured with replacing that "S" trap I would never push him to tear out all his drainage and tear his house up replacing "S" traps with vented "P" traps.
Granted, plumbingwise, It would be the ideal situation. But our asker's retire liuving on a fixed income. Ya got to take all aspects into consideration. Ya got to think "outside the box"! We're not here to inflict our partictular code in any body, especially a code that only10% of the nation follows. We're gere to get the asker's problem repaired, not to bring him up to UPC, ( which I personally find to be restrictive, more costly to the home owner that lives under it and in some cases, downright silly.
So bear in mind what this page's all about! End of serman. Peroid! Tom

You guys are all great... thanks to all of you... especially you Mark... much appreciated... I'll think it shouldn't be a problem to go per your instructions/diagram... will check back in when I geterdone... thanks again everyone... peace...

THANKS FOR THE UPDATE MMM...

Look forward to hearing when you are all set!

Mark