18" Steel Hinged Heavy Duty Flap Gate for PVC, CMP | Agri Drain This 6" Valterra valve attaches

This 6" Valterra valve attaches to SCH40 PVC pipe and offers unrestricted flow

This 36" version fits on the outside of Corrugated HDPE Drainage Pipe and is intended for heavier-duty surface conditions

snaps together with other Hickenbottom parts

This 24" version fits on the outside of Corrugated HDPE Drainage Pipe and is intended for heavier-duty surface conditions

75" to 11" and is designed for PVC and Corrugated Metal Pipe (CMP) outlets

18" Steel Hinged Heavy Duty Flap Gate for PVC, CMP | Agri Drain This 6" Valterra valve attachesHelp keep damaging water out of drainage systems with this 18" heavy duty hinged flap gate. It fits outlet ODs from 18. 25" to 20" and is built for durable outlet protection on PVC and Corrugated Metal Pipe (CMP).