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Old 03-26-2010, 09:25 PM   #1
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Basement Plumbing for 1/2 bath..please help..


So Im making some progress guys, but I need pro help to make sure we are code.. My father in law is throwing this together but I know he is no plumber and Im doing my research.. If you look closely the red lines on the bottom right corner of the hole i cut out is where the toiled would go- 14" frlom the block (allow 2" for foam board and drywall). And then to the left I will cut some more slab so I can route a 1.5" pipe for the vanity sink...

Thanks for all your advice..the soil stack is not glued yet and that side tee that the trap is going into should be a wye from what im hearing so far..correct?



How much should the pipe for the toilet come out of the ground? Should it be generously higher than the floor so we can cut when we poor the new floor?

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Old 03-27-2010, 06:28 AM   #2
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Basement Plumbing for 1/2 bath..please help..


You are looking good so far--The sink should have a vent--

The toilet stump should be left long and cut after pouring----

Styrofoam collars are available to go around the pipe --if you are using a flange that glues to the out side of the pipe--I usually use an inside glue flange -so I cement up to the pipe--(No collar)

Concrete-- Flat is best----a little low can be filled as you tile---to high--not good-grinder time!!!

--Mike--

Edit:
That is one clean cut you have there! How did you make such a neat cut in the concrete?

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Old 03-27-2010, 08:28 AM   #3
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You are looking good so far--The sink should have a vent--

The toilet stump should be left long and cut after pouring----

Styrofoam collars are available to go around the pipe --if you are using a flange that glues to the out side of the pipe--I usually use an inside glue flange -so I cement up to the pipe--(No collar)

Concrete-- Flat is best----a little low can be filled as you tile---to high--not good-grinder time!!!

--Mike--

Edit:
That is one clean cut you have there! How did you make such a neat cut in the concrete?
MIke, thanks you have really helped! Im arguing with my father in law if a vent is needed or not. He believes since the system is already vented why would we need another vent so close to the stack.

Behind that soil stack (side where you see the extension cord) is the outside wall. Do I need to route the vent from the left wall and route it pointing out of that wall? That would look weird..What I dont bother?

Also, what kind of slope do I want to see on the 1.5" toilet and vanity pipe into the stack?

Is it true 90's are no-nos and I should go with two 45s to make the turns for the vanity?

Do you guys see any issue with simple gravity used for flushing/draining? It looks to me the soil stack goes deep enough to tap into..but just want to be sure..you are the pro.

Oh my brother in laws are road construction guys, their dad was a foreman so they broke alot of concrete..lol..he also borrowed some of their equipment to help breaking up the floor.

Last edited by heracles; 03-27-2010 at 08:31 AM.
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Old 03-27-2010, 08:46 AM   #4
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Basement Plumbing for 1/2 bath..please help..


To vent the vanity--you will likely just tap into the stack about 4 feet above the floor-use a sanitary T for the trap connection--then up and over to the stack with a vent.

90's are fine for your sink piping.

I hope Alan or another plumber will chime in--I have to go to work--Mike--
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Old 03-27-2010, 08:57 AM   #5
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To vent the vanity--you will likely just tap into the stack about 4 feet above the floor-use a sanitary T for the trap connection--then up and over to the stack with a vent.

90's are fine for your sink piping.

I hope Alan or another plumber will chime in--I have to go to work--Mike--

Thanks again Mike..!
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Old 03-27-2010, 09:08 AM   #6
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Basement Plumbing for 1/2 bath..please help..


Heracles---I am a very conservative guy --Some times I do a little over building on my end.

The vent on the vanity may not be required if the distance to the stack is short enough.

The cost in time and parts is small--I would install it,myself--let's see if a plumber knows the max distance that a drain line can run,before a vent is required by code.--M-
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Old 03-27-2010, 12:36 PM   #7
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Basement Plumbing for 1/2 bath..please help..


Let's start with that mess on the right. Are you keeping that? If you are, the abs and pvc can not be glued together and it looks like even though there is a vent, it's in the wrong place and you have a full s trap there. Next, deos that 4" PVC/CI pipe recieve waste from fixtures above? If it does anything else dumped into it will need to be vented up through the first floor and above the flood level rim of the highest fixture served by the stack.
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Old 03-27-2010, 03:49 PM   #8
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Basement Plumbing for 1/2 bath..please help..


The fitting that the trap is dumping into does not need to be a wye according to oregon code.

Going from a horizontal drainage line into a vertical drainage line does not have to be a drainage fitting. Going from a vertical drainage into horizontal would need to be a drainage fitting.

Looking at that offhand, my first concern would be the joints that have duct tape around them. Find out why. They may need to be redone.

In response to mike's comment about furthest distance from stack before a vent is required.... in Oregon, you can go 3.5 FT on 1-1/2" drain with only 90* change of direction

2" is 5 FT with only 90* change of direction. Any further than that and more than 90* and they are required to be revented.
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Old 03-27-2010, 10:34 PM   #9
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Basement Plumbing for 1/2 bath..please help..


running into a wye makes it much easier to cable the line though
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Old 03-27-2010, 11:05 PM   #10
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Basement Plumbing for 1/2 bath..please help..


Hey guys,

So in gonna plave a 3"x3"x 2" wye in the 3" pipe that runs from the toilet to run the 2" pipe that will go to the sink. Do I need a P trap in the line for that I will use for the sink/vanity? Pardon the 3rd grade drawing!!lol






Thanks
Tim

Last edited by heracles; 03-27-2010 at 11:10 PM.
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Old 03-28-2010, 07:26 AM   #11
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Basement Plumbing for 1/2 bath..please help..


Never put a P-trap into a line------The sink has a P-trap --that's all you need.--M--
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Old 03-28-2010, 11:24 AM   #12
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In the drawing the wye is backwards and you didn't answer the question about fixtures above or that mess on the right.
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Old 03-28-2010, 06:39 PM   #13
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In the drawing the wye is backwards and you didn't answer the question about fixtures above or that mess on the right.
Which wye? The small one that has the pipe going to is which reads washer?

What comes down is the bathroom sink I believe..I Identified the pipe that brings waste water from the kitchen sink..it all ties to the big white stack. I am not sure why there is that seperate 2" stack coming from the bathroom..At first I thought it was a vent..
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Old 03-28-2010, 08:35 PM   #14
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Basement Plumbing for 1/2 bath..please help..


Quote:
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Which wye? The small one that has the pipe going to is which reads washer?

What comes down is the bathroom sink I believe..I Identified the pipe that brings waste water from the kitchen sink..it all ties to the big white stack. I am not sure why there is that seperate 2" stack coming from the bathroom..At first I thought it was a vent..
He's referring to your drawing. The wye you drew in there is drawn backwards.

If the 3" line is receiving the discharge from a fixture on the 2nd floor, then (this is law in oregon) you would not be allowed to use that as a vent also, meaning all the fixtures downstairs would have to be vented to the floor above, and revented into the 3" stack above the point where the bathroom sink above ties into the 3" as a drain.

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