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nate220 · Dec 30, 2008, 10:13 AM

I posted previoulsy about my basement bathroom layout and got some great help. We have since, re-layed out the fixtures. I have attached the revised layout and am asking if the drains I have are acceptable. I would like to use the exist wye for the existing floor drain to tap everything into. It results in the main toilet line to turn back on itself and a large distance between the tub and sink.

I drew the drains with straight lines but know I need to use long sweep elbows.

Will this work? Do I need another AAV for the tub?

Thanks for the help.

21boat · Dec 30, 2008, 10:53 AM

I don't see a vent for the toilet and the sinks which should not be S traps and use P traps. On the T "sinks" and 1 1/2 inch should be up and over to going a main vent all tied in and vented The pipe angle from the double bowl sinks seems to be running the wrong direction. The crocked wash tub is also crocked under the toilet why?

nate220 · Dec 30, 2008, 03:42 PM

I am planning on using a AAV on the sink and from what I have read, the tub is usually wet vented from the sink. Would I need another AAV for the tub or toilet since the distance is large

Yes, the vent to the sink is drawn wrong. It would come 90 off then then sweep back to the sink. The drawing tools were limited

nate220 · Dec 30, 2008, 03:44 PM

Originally Posted by 21boat

The crocked wash tub is also crocked under the toilet why?

Not exactly sure what this means but the wash tub was just angled by the toilet to show it would sneak between the toilet flange and the san main.

andrewc24301 · Dec 30, 2008, 04:11 PM

Every fixture has to be vented somehow, no matter its distance to other vented fixtures.

In the plumbing system of the whole house, is there a vent that leads out the roof?
The reason I ask, is because AAV's only work to relieve negative pressure, but do nothing in the case of positive pressure.

Milo Dolezal · Dec 30, 2008, 09:05 PM

There are several ways of roughing it in. This is what you would have to do under UPC. It is more complicated, every fixture has its own vent (red dot) and main 3" / 4" line ends with Clean Out behind tub. Toilet and main run in 3" / 4" pipe, all others in 2" pipe. Vent for sinks, tub in 1 1/2", vent for washer and toilet in 2". Where possible, vents can be combined no less than 48" above the floor.

nate220 · Dec 30, 2008, 09:20 PM

The San main runs right to left on this image with the wall on the top of the image being an exterior wall.
The main vertical stack is at the stub wall at the 3'8" dimension.

I don't really want to run the vents all the way to the attic as I do not have a spot to run it through the main floor walls.

From the stuff I read on this site, it seemed like the normal rough in was to run the main to the toilet, branch off for the sink and then branch for the tub. The tub is then wet vented of from the sink, assuming the sink was vented (AAV)

Milo Dolezal · Dec 30, 2008, 09:26 PM

Originally Posted by nate220

The San main runs right to left on this image with the wall on hte top of the image being an exterior wall.
The main vertical stack is at the stub wall at the 3'8" dimension.

I don't really want to run the vents all the way to the attic as I do not have a spot to run it through the main floor walls.

From the stuff I read on this site, it seemed like the normal rough in was to run the main to the toilet, branch off for the sink and then branch for the tub. The tub is then wet vented of from the sink, assuming the sink was vented (AAV)

You are not listing your geo-location. Plumbers on this site are from all over the country. Code varies from State to State and from City to City. What is perfectly OK in Oklahoma City will not be OK in San Diego. I am sure other plumbers jump in and present other options.

I will rework that sketch for you...

Milo Dolezal · Dec 30, 2008, 09:33 PM

Here is new sketch showing main sewer going R to L...

nate220 · Jan 1, 2009, 02:58 PM

Thanks, I am in Grand Rapids, MI

I really did not want to cut into the san main that many times. Is there a way do use the exisitng floor drain wye (its a 4") similar to my initial sketch?

Thanks

nate220 · Jan 2, 2009, 09:21 PM

Is there anything wrong with my initial sketch if I add a AAV to toilet or tub?

nate220 · Jan 3, 2009, 08:59 PM

From reading even newer posts and questions, I don't see anything wrong with my initail sketch. Am I missing something?

THanks

nate220 · Jan 5, 2009, 02:52 PM

Is there any problems with the "curves" in the runs of my initial sketch?

nate220 · Jan 6, 2009, 07:42 AM

I posted previoulsy about my basement bathroom layout and got some great help. We have since, re-layed out the fixtures. I have attached the revised layout and am asking if the drain layout I have are acceptable. I would like to use the exist wye for the existing floor drain to tap everything into. It results in the main toilet line and sink drains to "curve" forming a "U". Is this acceptable as long as long sweeps and the proper slope is on the pipes.

I drew the drains with straight lines but know I need to use long sweep elbows.

Will this work? Do I need another AAV for the tub?

Thanks for the help.

Milo Dolezal · Jan 6, 2009, 08:14 AM

Nate, if you have to make 180 degree turns, use 45 degree bends as shown in drawing below. By our Code, we have to have one Clean Out for every 135 degrees of bends. If you want to go by this rule, than install 2" C.O under the sink, below the drain inlet. As far as tub vent goes: I would definitely install one.

nate220 · Jan 6, 2009, 09:22 AM

Thanks, Milo.

If I vent the sink and tub with AAV's (It's allowed here and I have locations to put them where they will be accessable), will this layout function well?

nate220 · Jan 7, 2009, 07:16 AM

Milo,
Is there a recommended or minimum distance between the 45's

Milo Dolezal · Jan 7, 2009, 07:20 AM

Np, there is not. But if you have space, space them out. You certainly don't want to put them next to each other.

nate220 · Jan 7, 2009, 07:30 AM

Thanks, Milo.

If I use the 45's, AAV on sink and tub, do you see anythign else wrong with my layout?

Milo Dolezal · Jan 7, 2009, 07:58 AM

It looks fine to me.