SharkBite U3088FLEX18LF Flexible Water Heater Connector 18 in . The Water Heater Connector is used to connect the hot and cold supply lines to the water heater. The SharkBite connection allows the installer to connect to copper, PEX and CPVC tubing. It can be used in residential or commercial applications. Water Heater Connector has 3/4 in FIP and 3/4 in Sharkbite Fitting by 18 in long. This product is lead free.