The RF570 is a roof flashing for the SL1100 and SL400 Series chimney pipe, for roofs with a 0 to 6/12 pitch. It seals the roof penetration around the chimney pipe and sheds water away from the opening. Choose the flashing that matches your roof pitch. Always confirm the pipe size, approved components and clearances in your fireplace, stove or chimney installation manual before ordering. For steeper roofs, use the RF571 (7/12 to 12/12 pitch).