I found the rubber fitting that fits inside the cast hub. It fits very tight (I used lube) So does the PVC fitting when I tap it in with a 2x4 and a block. When I tap it in far enough, it seats real well past the "lip" (see photo where pen points) on the PVC fitting. But I'm wondering if that is too far.

"Past" the lip seems tight. "Before" the lip is VERY tight but wants to squeeze back out.

I'm wondering if I should seat it or leave it prior to the lip and strap it down from wanting to walk back out?

I'm also wondering if I should pack this whole set up in mortar as the guy at the plumbing house said a closet flange might work loose over time and those hubs are meant for below ground. The old lead pipe was encased in 3 or 4 inches of mortar. In fact, looking through the open ceiling up at the neighbor's toilet area, the floor looks like it was replaced but left the supports and a small patch of the old mortar.

I have to work in maybe a 22.5 street elbo to move the flange over to the right as the old lead pipe was bent to account for the cast hub being in on an angle.







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You drive it in as far as it can go so it seats ALL THE WAY into the hub. It should have a "ring" on the front that contacts the hub face.

This doesn't appear to have a ring on the front. Do I have the correct fitting?

If it wants to "walk" or creep out, then that probably is indicating that the pipe is not pushed in far enough. Once it is pushed in far enough, it will tend to 'suck' in and stay put. Other than that, everything looks A-OK.

I'm wondering what I should do to secure this set up. I've thought of shimming it and strapping in down with a block in front to prevent moving forward.

The guy at the plumbing supply house gave me the stink eye for using the hub connector "above ground" and said the constant movement from use of the toilet would cause a leak.

If that is a concern, I would consider pouring mortar in that recess to mimick what was there locking in the old lead pipe. There was 3 plus inches of mud on the whole foot and even more in the recess.

There will be two layers of plywood and the flange will be screwed down tight. So I don't know......

(I'm the paranoid type)