I am trying to figure out how to vent and drain a saniflo pump for a bath/shower in a basement. I have preexisting drain lines for a toilet and sink exposed in framing so will only need the pump for a bath. I have studied up on drains and vents and installing saniflo but am stuck on where to hook up the drain line from the saniflo pump to the plumbing system and where to hook up the vent line to the plumbing system. Any help would be appreciated. Thank you,
Nathan

A few pictures of your existing plumbing might help us help you

[www.plbg.com]

as suggested, pictures are very helpful.. in a few words, you can drain into any drain stack as long as you don't cut in between a fixture and its vent.
as for the vent, you can tie into any vent stack or any fixture vent as long as you are 6 inches above the fixture overflow point.

Sorry new to this site. Couldn’t figure it out. [postimg.cc]

[postimg.cc]

the first image you show has a vertical vent pipe way over to the right . you can tie a vent into it up where it is vertical.
you can tie the drain into the vertical 3 inch stack right about where the black wire crosses it

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Thanks so much. That’s what I was thinking but wanted to be sure. Is there a problem if you tie into the 3 in drain pipe on the horizontal section? I’m assuming no, but again just trying to make sure. There’s so many obstructions already I’m not sure I could tie in on the vertical. Highlighted portion of drain I am talking about. [postimg.cc]

Is the 3" horizontal the drain for upstair's toilet? If yes, then no you can't tie into that section. It would appear that the toilet's vent run out top of stack behind the floor joist and you can't connect in between the fixture and it's vent.

its really not that hard to cut into the vertical stack. this is the only picture i could find. you essentially make 3 joints. 2 glued and the top one is rubber coupling. ignore the glue on the top joint shown. slide the rubber coupling on, roll the end back like you are rolling up your sleeve and slide it together.

I follow the problem is it needs to run to the right which there’s a lot of obstructions for the discharge pipe.

[postimg.cc]

Thanks Steve. So this would work? [postimg.cc]

The connection for the vent needs to be in the horizontal green section that I added or above there.

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What model Saniflow are you planning to use? What's on the otherside of the green wall?

Saniflo makes a tub/shower pump system that discharges through a 3/4 or 1" pipe. Can you run the discharge overhead and drop down to the stack?




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So the vertical part of the vent in the corner would work? Where highlighted: [postimg.cc]

Sanivite due to it being for a bathtub. This is about the only one that allows for bathtub usage. The green wall is actually the concrete foundation of the basement.

Here’s a photo of the discharge pipe’s starting point and its planned route: [postimg.cc]. As you can see, there are several obstructions along the path. However, I’ve read that it’s possible to connect the discharge pipe to a cleanout, and I have a cleanout on the other side of the wall where there are no obstructions: [postimg.cc].

Here’s a picture of the cleanout: [postimg.cc].

Additionally, I’ve read in the Saniflo instructions that once the discharge pipe goes horizontal, it shouldn’t transition back to vertical. Could you clarify if a drop down is considered different from going back up vertically?

Don't use the cleanout, it's not a drainage fitting and you would still have to add a replacement cleanout fitting. Just install a wye in the stack above the cleanout.