4" DURA ROOF Anti-Backup Retrofit Drain #BDU4 | MARATHON

4" Dura Roof Anti-Backup Retrofit Roof Drain BDU4 from Marathon. The 4 inch DURA DRAIN Anti Backup Roof Drains are thermoplastic rubber retrofit roof drain that is highly resistant to ultraviolet sun rays, other atmospheric and chemical conditions. Compatible with BUR, Modified and EPDM.  Plastic DURA strainer sold separately.

DURA DRAIN ACCESSORIES:

DUA 10 Perforated Ring w/ Strainer Dome

• The perforated ring is specially designed to hook onto the strainer dome and can be attached to every waterproof surface with asphalt or mastic by means of the many conical holes in the ring. Three hooks secure the strainer dome in place.

DUA 20 Basket Strainer for Dura Anti-Backup

• Flexible open weave basket designed to fit drain openings 3" to 5"

DUA 30 Basket Strainer for 6" Dura Drain

• This large drain has different characteristics and can be fitted on residential and industrial roofs. An inside knurled ring permits the strainer dome to be anchored.