OATEY 43650 4 in. ABS Twist-N-Set Closet Flange

It installs inside 4 inch pipe and the gasket expands to seal inside service weight, heavy weight and no-hub cast iron pipe. That is the main reason people reach for it: replacing a broken cast iron toilet flange without cutting the pipe out of the floor.

Inside. It is an inside-fit 4 inch closet flange, so the body drops down into the existing 4 inch pipe and the expanding gasket grips the pipe wall. If your pipe stub is sized so that a flange has to slip over the outside, this is the wrong style.

No solvent cement and no tools. The Twist-N-Set design sets by hand: drop it in the pipe and twist to expand the gasket against the pipe wall. That is what makes it a practical repair in an occupied unit where you cannot get a torch or a saw to the drain.

No, the sleeve is not included with the 43650. Order it separately if your repair calls for one.

The body is ABS plastic. ABS is standard for DWV service and it will not rust out the way a cast iron flange eventually does, which is usually why the original failed in the first place. For property managers standardizing toilet repairs across a building, one part number covers any 4 inch drain regardless of whether the pipe is cast iron or plastic.

Oatey specs it with a smooth unrestricted flow design, so the inside-fit body is shaped to keep the waterway clear rather than choking the 4 inch drain down.

It is listed at 0.6 lb, with a volume of 0.099. Light enough that a plumber can carry several in the truck for repair calls without thinking about it.