SharkBite, 3/4" PEXA brass expansion x 3/4" FIP x 18" L stainless steel flexible water heater connector. SharkBite expansion water heater connectors are designed for use with PEXA pipe and expansion rings. SharkBite expansion water heater connectors are designed to connect PEXA pipe to the MIP threads on your new or existing water heater. Expansion fittings require an expansion tool in ordered to make the connection. Lead-free dezincification resistant brass construction. Compatible with PEX-A pipe only. Requires PEX expansion tool make connection.