Sierra Shields #1600 Water/Heater Hose 1-1/4″ x 50′ Sierra Shields 1600 Water/Heater Hose has a good bend radius, fabric reinforced & has an EPDM tube & cover.It is resistant to mild chemicals, heat, cold, ozone, and saltwater. Specifications: O.D.:1 3/4″ or 44.5mm Wt. “C”:62 I.D.:1 1/4″ or 31.8mm Working Pressure:200 PSI The temperature ranges from -40F – +190F Applications: This hose is primarily used for critical water connections, heat exchanger, toilet intake Also used for small engine intake, bilge pump intake/discharge, & below water line drains & scuppers