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I have to break up concrete and install a basement bathroom.
I am putting a sink on the opposite side of the toilet and the shower will
be almost inbetween the two and off to the side with a half wall next to shower.
3"Stack is next to shower and runs from upstairs bathroom and up thru roof.
I have existing venting next to the upstairs sink that the laundry vent is connected to and another vent attached to the tub drain (wet vent). The best way to vent this whole set up?
sink <--------------------------------->toilet
x x
3" stack----shower
next to stack is upstairs venting/etc.
I have about 9 feet between toilet and sink from behind.
I have about 7.5 feet from stack to opposite wall.
I have ducting above the sink area.
Can't get any one in the city to tell me if I need a backwater valve or not, and I need to get going here. I have all the cast iron out and I have to tie 2" floor drain waste pipe as well. I am at the point where I am thinking I should just install the darn thing so I can
get going.
I am replacing the old bathroom set up and running new waste lines, etc to the right of the
laundry/floor drain set up. I took everthing out because the old waste line from the floor drain wouldn't allow me much room to connect after all the old fittings. Here is my new diagram. The bathroom is appx 9 x 8 9' going from top to bottom in the diagram.
My question is - is there another way to have the 2" drainfloor/laundry horiz. waste tie into
the sewer line? If I have to place another connection after the main verticle stack - running horiz., I will almost have to break up more floor! What a waste.(which is really 4" now that I can see it by eye) If I position the backwater valve on the branch drain - It's really close with the shower/sink wyes connecting. Can I get some input on idea's on this? I would appreciate any input if you have the time.
I am thinking of making a connection from the floor drain/laundry waste pipe behind the main stack. The waste pipe will be 2" and at that point at the stack i am going four inches.
or, I can leave everything 3" inches and put a reducer on the connection after I branch off for the bathroom. I have room for slope. I am trying to figure out the best fittings to use for this. I know I should know, but I guess trying to do too many things at once. There is a santirary tee I could use, but that would bring the vertical down very low. I found out I don't have to use a backwater valve.
I have encountered an issue. I have to reconnect the kitchen sink.
I have somone helping me, and went down to find this in the muck. Yes, i thought about my kitchen sink drain - but then forgot after sliding in the muck. Man - try removing your foot in this stuff - the whole boot stays in place.
Can I connect the old kitchen sink drain that is under slab into the new two inch shower drain? I draw up a sketch.
Thanks.
Here is a sketch. The orange line is the old kitchen sink drain coming from above down under where I am putting in new bathroom branch drainage.
I came down there today and said "Oh - OH" we need to re-route the kitchen drain.
With all the muck from the water in the dirt, didn't even see until I pump the water out and dug a bit more. Don't ya love plumbing, muck and politics?
Under the IPC you are allowed to wet vent in groups such as a bathroom group. They recently updated the code as of Jan 1st and now you can even take a fixture and wet vent it on a bathroom group even if it is not in the group
So wet vents are allowed in your area. You have vented the floor drain, the only fixture with a trap that doesn't have to be vented and you've installed a "S" trap on your laundry tub that will get the job turned down.
Since you're allowed wet vents in your area you can forget about laying out according to UPC.
Let's do away with some of those vents. The toilet wet vents through the lavatory so we can lose that one. The shower can connect to the utility drain line nand wet vent through the laundry sink vent, ( as soon as you replace the "S" trap with a vented "P" trap).
Quote:
is there another way to have the 2" drainfloor/laundry horiz. waste tie into
the sewer line?
I can't see one. You've used the shortest route and that's good plumbing practice.
Quote:
I am thinking of making a connection from the floor drain/laundry waste pipe behind the main stack. The waste pipe will be 2" and at that point at the stack i am going four inches.
Works for me.
Quote:
There is a santirary tee I could use, but that would bring the vertical down very low.
Sanitary tees under the slab are a no-no.
Good luck, Tom
Can you make a drawing with more detail? Size the pipes and show me where those other lines are coming from.( what's the left line draining?) It's not too good a idea to mix kitchen grease and garbage with grease and hair from a shower drain. Make me a better drawing . The way it looks now you're discharging major fixtures past a unvented shower trap. Regards, Tom
I replaced older sketch with a more detailed one. The kitchen sink drain pipe is the old one. I can't replace it without tearing out existing finishes. it goes another 10 feet horizontally to left then goes straigth up to kitchen. It is also quite a bit lower when it crosses under the 3" waste pipe from the toilet. It comes just perfectly to the 2" shower waste line I just installed. Any suggestions? I was worried about mixing the kitchen with the shower line too - for the same reasons.
Also, I am having an issue with rolling my 3/2 wye at an exact 45 degree for venting the toilet off before the toilet bend. It's okay for the shower venting 2/2 wye. Any suggestions there as well?
You have more problems then just where to connect the kitchen drain. Let's start with the floor drain. As I stated in a earlier post,:
Quote:
You have vented the floor drain, the only fixture with a trap that doesn't have to be vented and you've installed a "S" trap on your laundry tub that will get the job turned down.
The vent you took off the main should vent the sink off the top end of a sanitary tee.
You're running too many vents for your IPC code. The toilet can wet vent through the lavatory vent. ( It is vented isn't it? Because iit must have its own ) It doesn't show a vent on the last drawing you put up. You can eliminate the shower vent by connecting it to the utility sink line and allow it be wet vented by it.
I assume the kitchen sink will also have its own vent so if the shower drain line is the only available tie in point then I would go with it. Would it be possible to install a cleanout somewhere on the utility and kitchen drain line? Time to draw up another set of plans. Regards Tom PS. I really hate to keep raining on your parade.
You have vented the floor drain, the only fixture with a trap that doesn't have to be vented and you've installed a "S" trap on your laundry tub that will get the job turned down.
My intention was to use a 2/2 wye just before the floor drain for the laundry drain trap - and use a regular drain trap. (Sorry the pic looks more like an "S' trap). Can I use the 2/2 wye as the drain and then vent vertically - adding the trap? CAn I then (above that trap) add another connection for another trap for a stand pipe? (that was just added to the scheme of things).
The toilet wet vents through the lavatory so we can lose that one
I think the sink is 8 feet away. So The toilet is upstream from the lav on the other side of the room. The state code states that i can wet vent a shower and lav, but said nothing about toilet, so of course I thought - now a need to vent the toilet. Then It says under the state code that the distance from the water closet trap and a nearest vent cannot exceed 4 feet. ---grrr. Am I reading this all wrong?
Tom - you are not raining on my parade. I am just less normal sleeping hours and I appreciate you helping me with this.
How far can a vent be from the shower? I looked it up on the states site and it says 5 feet. I am have to check again, but it doesn't look like it will make it if I try to use the utility waste line, unless that means at connection to were it drains into the line. But I thought it was from the point of the trap of the shower.
The kitchen sink does have it's own vent. it's on the side up through the roof. No problems there. (sigh)
going back to make sure my measurements are right. It would be so delightful to do it the way you suggest.
The new sink location is behind ducting. I tried to run it every way with 2" venting, and kept getting blocked, even with the tiniest slope. I would have to drop down again.
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