PEX can’t be specifically linked to a water heater. To start with increase a pipe 18 in. out of your water heater and link the PEX on the pipe. CHARLIE: Back up a 2nd here, this means you’re declaring that some installers will set the PEX in and just depart https://pexrepipe10865.celticwiki.com/1283116/what_does_pex_repipe_mean