Water Hose Heavy Duty – Series No. 135 – #1350. #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.