18" Steel Hinged Flap Gate for Corrugated HDPE Drainage Pipe | Agri Drain This 12" collar fits on

This 12" collar fits on the outside of PVC or Corrugated Metal Pipe (CMP) and holds the grate flush inside the collar

Zinc dichromate-plated steel resists corrosion and installs inside 12" I

Steel extension that adds height to a 14" catch basin used to collect excess surface water in residential or commercial applications

It fits outlet ODs from 53

18" Steel Hinged Flap Gate for Corrugated HDPE Drainage Pipe | Agri Drain This 12" collar fits onHelp keep damaging water out of drainage systems with this 18" steel hinged flap gate. It fits outlet ODs from 20. 5" to 22" and is built specifically for Corrugated HDPE Drainage Pipe.