Dear Experts,
I am trying to finish a basement bathroom with rough ins from when my house was built 5 years ago. Rough ins were all in the wrong places so I had to dig them out. Just wanted to know if my layout and venting looks OK to you. Thanks so much in advance for any help you could give... Spock

Well Mr. Spock, I hate to rain on your tricorder but your rough in won't make it to warp drive. You are discharging a major fixture, (your toilet) past a unvented minor one,(your shower) and that's a no-no. Also the lavatory looks to be more then five feet from the vent.
In addition I don't see a dedicated vent coming out of your sewage ejector.
Most bathroom groups are roughed in like this.
Toilet connects to sewer main . Lavatory connects to toilet drain and runs a vent off the top the stubout tee out the roof or revents back into a dry vent in the attic.. The toilet wet vents through the lavatory vent and the tub/shower connects to the lavatory drain and is wet vented by it. This is a normal rough in and is acceptable both by local and state codes and also The Standard Plumbing Code Book in 90 percent of the country. Check your local codes to make sure you're not in the excluded 10 percent.. The vent off the lavatory may be run out the roof or revented back into a dry vent in the attic or if you're reventing back into a fixtures dry vent you must make your connection at least 6 inches over that fixtures flood rim. Also the vent coming out of the sewage ejector pit MUST be a dedicated vent through the roof. It can not tie back into any of the house vents. The reason being that while house vents just breath in, pit vents both breath in when discharging into the sewer and expel out as the basement fixtures drain into it. Rework your drawing and let's see what you come up with. Good luck, Tom

Dear Speedball1 and Experts,
Thank ou for your time in answering my question. I reworked the diagram a little and would appreciate itf you could tell me if we have takeoff his time.
Thanks in advance,
Spock

Hello spock, yes that will work, just make sure you have a p trap for the shower drain, it seems you've got one drawn on the diagram but not sure. The auto vent you plan to use for the lav will need to be accecable, so you will need to install an access door, or you might want to rig it up under the vanity cabinet. Good luck ---zeke---

In addition to Truck41 advice: if that "pump" in your diagram is a sewer ejector than it needs to be vented, too...

Welcome back Mr. Spock,
I brought Milos concern up in my first post.

Quote:

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the vent coming out of the sewage ejector pit MUST be a dedicated vent through the roof. It can not tie back into any of the house vents. The reason being that while house vents just breath in, pit vents both breath in when discharging into the sewer and expel out as the basement fixtures drain into it. Rework your drawing and let's see what you come up with.

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Well you reworked it and we still don't see a dedicated vent from the ejector pit. Also, unless you live under UPC codes the toilet will be wet vented by the shower and you won't need the 3 X 2 wye and extra vent,( check your local codes to be sure), however those underslab wyes that take off for the vents must be rolled up on a 45 degree angle to pick up the vents. Good luck, Tom