Flexible Water Heater Connectors Hose. Water Heater Connectors is used in residential and commercial applications to connect the hot and cold supply lines to the water heater. Easy to use push to connect fitting make for a quick and clean install. Flexible Heater Connectors makes for a simple installation for new or replacement water heaters. The connectors are metal with braided alloy. Contains special dielectric insulated connectors to protect against electrolytic action by using Water Heater Hose. Flexible Copper tubing of this Braided Water Heater Connectors.