Plumbing question re: ABS pipe

[mcbane]

I have a "horizontal" ABS sewer line sloped at just over 1/2" per foot as needed to follow ground slope to a septic tank. What is the correct way to connect that pipe to a vertical drain stack?

Seems like the options are:
1) force fit the pipe into the fitting, which might preclude getting the pipe full depth into the socket
2) try to accomplish a change in slope to 1/4" per ft in the last 10 ft or so before the transition to vertical pipe
3) use a rubber coupler to permit a small angular offset
4) maybe some better way?

 

[The Cobbler]

you want full insertion into the fitting. a good clean pipe with ample glue will make it easier .
ABS has a fair bit of play in it, meaning you can flex the joint a bit to get the vertical lined up . assuming this horizontal pipe is already in place, I would cut out a section, get your T, glue in a pc of abs to make the right length. slip on a rubber fernco coupling , glue up the hub & pipe, slide it together . pull on the fernco, tighten it up and you now have your t in place. glue on the stack ...
don't worry about the slope, ABS is quite forgiving

 

[Red 17]

I'm no plumber.

Suggestion 1: Connect a short piece of straight pipe into the drain stack. Then, instead of running the horizontal straight at it, offset it a bit and use two 45s with a twist to connect.
You'll have to mock it up first to see if you can make it work. You may have to use a no-hub connector in there, but based on a couple plumbing site threads, try to reduce the misalignment to as little as possible if the twisted 45s won't do it.

#2 would be to just use a no-hub by itself 6" or a foot away from the stack. Seems like that invites a clog spot.

"Forcing" the issue might work if you start at the stack with a cured secure square joint and a long piece of ABS that will bend a little. Seems like most of them have a curve in them already from sitting outside in the sun.

 

[Red 17]

Fernco fittings are supposed to be underground where they "can't" be moved for flexed. Open air fittings are supposed to be the no-hub shielded couplings.

 

[The Cobbler]

^^^ perhaps in Cali, not the case here tho!

 

[Red 17]

https://www.inspectorsjournal.com/topic/16988-rubber-connector/
Seems to be one of those things that starts "discussions" depending on where an inspector finds one. Come to think of it, I used one to join two or three vents above the bathroom in my garage. (toilet, shower, sink) I went up to larger pipe for the roof penetration so I could have only one penetration. Inspector passed it, probably sensing my humiliation at not being able to glue all those together without a leak in one of them. Your suggestion is the most straightforward way and will probably work flawlessly.

 

[rlitman]

^^^ perhaps in Cali, not the case here tho!

Well, to be fair, Fernco makes both types, and the Fernco moniker seems to be applied to both equally here, so it can be confusing. But the ones with the metal wrap are appropriate for this.

 

[K'ledgeBldr]

Well, to be fair, Fernco makes both types, and the Fernco moniker seems to be applied to both equally here, so it can be confusing. But the ones with the metal wrap are appropriate for this.

Doesn't matter what Fernco (or any other manufacturer) manufactures, markets, or sells, it's all about the state's, county's, or municipality's acceptance of the IRC/IBC.

They can't make codes "less stringent", but they can make them more stringent. And in some weird-*** states (no names mentioned), they write their own rules- just to difficu.. I mean different.

 

[rlitman]

Doesn't matter what Fernco (or any other manufacturer) manufactures, markets, or sells, it's all about the state's, county's, or municipality's acceptance of the IRC/IBC...

No argument from me there. I'm just saying that the work "Fernco" is too often used generically to refer to all sorts of parts they they may or may not even make.

 

[Jackfre]

Get a coupling and your San tee or wye. File out the stop on the coupling so it will slide over the pipe. Take careful measurements so you know where the coupling is supposed to sit. Glue up the San tee and short piece of pipe. Apply the glue, plenty of it and slide the coupling back over the pipe to its proper location. Give yourself some room here and have a hammer to drive the mis-aligned pipe to its proper position.

 

[flat350]

Don't use a coupling,use a couple of 22 1/2 deg fittings to connect to the tee.You'll be able to roll them around so you can get a more square connection to the tee.