Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Teslamagnifier-at-aol-dot-com> If the coil is a 4" pvc (the thinner drainage pipe--not the thicker waste pipe) coil, you can glue a cap on it (from Home depot) The cap in turn will fit inside of a plastic toilet flange. Ace Hardware sometimes has nylon bolts which can be used to secure the toilet flange. could also use epoxy Bill