SharkBite 22441LF Push-Fit Water Heater Installation Kit, Brass | SharkBite 22441LF water heater kit 3/4 in FNPT x 3/4 in the SharkBite water heater kit is designed to simplify water heater installation. The kit features special push-fit fittings that allow the user to connect a water distribution pipe with ease. This product is lead free.