OATEY 42777 Moss Bay Replacement Flange

That is exactly what the Oatey 42777 repair ring is for. It's a hinged two-piece ring that drops over a rusted or corroded metal toilet flange ring and bolts down to the floor, so the existing PVC or ABS flange body and the closet bend stay where they are. No cutting, no re-glued fitting, no concrete work.

The ring measures 7.01 inches outside diameter, which is the standard footprint for a 3 or 4 inch closet flange ring. Measure the old metal ring's O.D. before ordering; if yours is larger than about 7 inches it isn't this part.

Everything for the reset is in the box: two repair flange halves, two 1/4 inch closet bolts, two large washers, two small washers and four nuts. You still supply a new wax ring or gasket and the six floor screws suited to your subfloor, since the ring's six screw holes take whatever the floor calls for (wood screws into plywood, masonry anchors into slab).

The 42777 is galvanized steel with a stainless finish and bolts down through six holes, so it spreads the toilet's load across the floor rather than relying on the damaged ring. It's a sound fix where the flange body itself is intact PVC or ABS and only the metal ring failed. If the plastic flange hub is cracked, split, or sitting below the finished floor, a repair ring won't correct that and you need a full flange replacement or a spacer.

The hinge lets the two halves open around the closet bend and the existing flange collar, then close over them. You don't have to pull the drain pipe or break the seal below to get the ring in place, which is what makes it a same-visit repair on an occupied unit.

Straight, not offset. It sets the closet bolts in the standard opposed positions on a flat plane, so the toilet lands in the same spot it did before. If your rough-in is wrong and you were hoping to shift the bowl, a repair ring won't do it.

The kit runs 0.59 lb with a shipping volume of 0.066, so it's light enough to carry several on the van without thinking about it. Ordering by model number 42777 gets you the complete kit, halves and hardware together, not the ring alone.