Marathon's Aluminum Fast Flow Drain is a heavy gauge aluminum drain that features a 2-inch wide band of high-density expanding foam tape with asphalt for water backup prevention. They are available for new or existing roofs and are available in 2 3 4 5...
Marathon's Aluminum Fast Flow Drain is a heavy gauge aluminum drain that features a 2-inch wide band of high-density expanding foam tape with asphalt for water backup prevention. They are available for new or existing roofs and are available in 2 3 4 5...