The angled roof outlet is designed to be used horizontally through parapet walls or pitched roofs this type of drain can also be used as a vertical type outlet in box gutter details.
For example, this drain would be used where the roof is lower than the wall where a hole through the wall allows water to drain into a gutter. Many large industrial building and 1960’s, 70’s & 80’s front porches have a similar roof design.
Horizontal Drain Kit
Kit contains 1 x Horizontal Drain 1 x 9" Un-cured Tape 500mm 1 x EPDM Primer 1x Leaf Grate