Shower and toilet vent into a sewage pit

[anderson7479]

I am adding a basement bathroom where the waste pipe out of the house is above grade. I will be adding a sewage ejector pit/pump. See diagram.

The pit will be in direct line with the shower drain which is approximately 30" away from the 2" p-trap and approximately 29 inches away from the toilet. The pit will be installed on the other side of the wall that separates the bathroom from the utility room. I will connect the 3" inch line from the toilet to the 2" line coming from the shower with a WYE. From the WYE to the pit is only approximately 7 inches.

Given such a short run, does the toilet and/or the shower need separate venting? If so, where is the best place to put that vent in the diagram? The sewage pit will have a 2" discharge and 2" vent coming out of the top of the pit.

Thank you for your help.

 

[Reach4]

Best place is to put the venting on the lavatory, which you did not show.

Also the pit itself needs venting thru a thru-the-roof vent. Not sure about NJ, but other codes call for that vent to be 2 inch.

 

[Sponsor]

 

[anderson7479]

Best place is to put the venting on the lavatory, which you did not show.

Also the pit itself needs venting thru a thru-the-roof vent. Not sure about NJ, but other codes call for that vent to be 2 inch.

The waste pipe going out of the house is only 8 inches off of the slab. Therefore, I am able to tie the lav right into the waste pipe going out of the house. The lav will also have a separate vent that ties into the house venting system.

Do you think I should not take that approach and tie the lav right into the pit?

 

[Reach4]

Tying the lav into the line from the shower before the toilet will take care of venting the lav and the toilet.

If I were making the rules, what you would propose, feeding into the vented pit for the shower and toilet, would be allowed. But the codes don't see it that way.