3" spigot closet flange with a knockout that will not break apart and cannot fall down

Drain pipe is strong, corrosion-resistant stainless steel ring, eliminates cracked flanges

Easier installation, no need to hold knockout while hammering

Holds 5 floors (22 P

S

I

) for head test

The inside diameter of pipe can vary significantly

These flanges are designed to fit inside most, but may not fit all types of pipe