Scupper - Cast Alloy - Large 

One way water exit for boats with self draining cockpits. Scupper mounts over flush drains above the waterline. The rubber flapper opens to dump water out and closes with water pressure to prevent backwash. Durable acetal mount flange.

N.B. Not intended for permanent immersion

Overall Size: 175mm x 86mm

Inside Diameter: 235mm x 145mm