Shields 1350 Water/Heater hose is fabric-reinforced and has an EPDM tube and cover. This hose is primarily used for engine heater hose, heat exchanger, A/C circulation, and drain lines (sink, icebox, shower and livewell). It is resistant to mild chemicals, heat, cold, ozone, and saltwater. The temperature ranges from -40°F – +212°F. Sierra Part #116-135-0126B.