How much length does ABS need to grip a closet bend

[Geo]

This is sort of related to my dry fitting a toilet flange question.

If I need to cut off some of the toilet flange before sliding it over the closet bend, how much pipe length would still be OK for holding the flange to the closet bend? Would 1 inch be enough for the glue to hold the flange to the bend? Especially if I screw the flange into the concrete floor with 6 tapon screws after I glue it.

 

[GrumpyPlumber]

Place the flange on the pipe (dry fit), make sure it's on tight then measure to the floor.
Cut that amount off the pipe.

 

[Sponsor]

 

[Master Plumber Mark]

About An Inch

if you have a street ell or something stareing at you
you can figure to cut off about half of the pvc flange and
it will not know the difference.... If you have about an
inch of glued area it wont go anywhere. in our lifetimes....


u

 

[hj]

flange

If you have to cut it off, then you cut it at the finished floor height and then glue the flange on after the flooring is installed. The only time you need to worry about how much length you need is when the bend is below the floor and you have to "stretch" the flange to reach it.

 

[Geo]

Place the flange on the pipe (dry fit), make sure it's on tight then measure to the floor.
Cut that amount off the pipe.

Thanks for everyone who helped!

I did exactly what you said Grumpyplumber and it worked perfect. Cut about 1/2 inch off the flange and had about one inch left to glue. Dry fitted it and then wiggled it off and glued it and put it on and it met the floor perfectly.

Then bolted it down with 4 tapcon screws, installed the toilet and the darn thing is flushing great! My wife is now happy to have a bathroom in the basement!

Thanks for your help!!

 

[GrumpyPlumber]

I'm ready for the bonus round.