SharkBite U3531LF 1/4 in X 7/8 in Toilet Connector (ballcock threads). SharkBite push-fit fittings are the fastest, easiest way to join copper, CPVC and PEX in any combination - wet or dry. Simply cut the pipe, de-burr and push on the fitting. SharkBite fittings can easily be removed and are reusable. This product is lead free.