Help in validating plumbing configuration for a basement bathroom

[Kimeros]

Gang, I need help with the basement bathroom configuration as per attached picture. I'm totally new to plumbing so I'd appreciate your help.

I have a couple of questions:

1. Are the venting coming form the sink and ejector pump to vent all fixtures properly? I have the impression that I need to vent the toilet separately. Or the fact that it's connected to the line going into the ejector and the ejector pump is vented is enough?

2. What's the minimum distance I have to keep between connections between point A and B, and B and C in the diagram?

2. In some examples, I see the drain line for the sink not being a vertical drop line (as depicted in my diagram), but a line going on the side through the studs and then dropping into a vertical pipe segment to the floor. Are both configs equivalent? In my case I can't use the latter due to the distance between sink and toilet.

As additional information on the diagram:

-Distance between (hole) centerlines: Toilet to shower is 41''. Toilet to Sink is 31''.
-All lines are 2'', except the one from the toilet to the ejector pump.
-The town inspector said its was ok to vent outside since we don;t have access to the inside venting stack.

Diagram attached. Any other recommendation or suggestions are welcome!

Thank you for your time and guidance!

 

[frodo]

pump has t have its own vent, all fixtures needs vents to drain.

 

[Kimeros]

Frodo, thank you very much for your quick response!

This means I'll have to bust up more concrete to make place for the venting lines under the slabs.

Do you have any suggestions in terms of distance between the toilet and sink connection, and between sink and tower connections (Points A,B, and C in the diagram).

Thanks!

 

[Mr_David]

pump has t have its own vent, all fixtures needs vents to drain.

Frodo, How is the toilet vented. would it not be better to wet vent the toilet and use the vertical vent as drain for sink? better yet, vent them both.

tossed in a couple diagrams that might be useful

 

[frodo]

or this...............

 

[Kimeros]

Frodo, thank you so much for replying and additional guidance.

Is there any difference between these plumbing configurations for the sink? (a straight drain to the floor vs a lateral drain dropping to a vertical pipe)

 

[Matt30]

2 issues usually occur when trying to go straight into the tee with the trap arm. One being that the vent going straight up usually ends up in the way of a light fixture, so you end up offsetting it anyway. And second, you have to make sure your trap arm is minimum 3" long for 1 1/2" p-trap. If you are using a pedistal sink, that can't always happen.

 

[frodo]

i saw your pex water stub outs...your sure you wanna do that? lotta guys will buy the copper stub outs,

makes it a bit more ridgid/ stable. cleaner looking

http://www.homedepot.com/catalog/productImages/400/46/4609355c-a9bc-4271-a628-c6092cfa5317_400.jpg

 

[Kimeros]

Team, based on your valuable responses I've modified the diagram to look like this below. Please check it out one more time. I'm still puzzled about the location of a cleanout for the shower as all piping will be under the concrete. Thanks!