self-closing flap-valve S 10/12, d: 108,5 mm
for use with floor drain PRONTO in place of trap insert (except for PRONTO K Alu), gratings and frames series 10 with 120 x 120 mm or with d: 120 mm, and for frames type SES 10/ECS 12.
Used on combined foul and rainwater systems, the flap-valve allows water to drain whilst preventing the escape of foul air and foam.
With no water seal, it cannot freeze!
– self-closing flap