4" Clean Check Extendable Backwater Valve | Agri Drain this riser has 4' of

this riser has 4' of 1" holes at 12 holes per foot for dependable inlet flow control in deeper applications

cushioned rubber handles

and helps continue surface-water drainage around turns and corners

This 18" collar fits on the outside of Corrugated HDPE Drainage Pipe and holds the grate flush inside the collar

garden work

4" Clean Check Extendable Backwater Valve | Agri Drain this riser has 4' ofPrevent sewage backup into a residence or building with this 4" Clean Check Extendable Backwater Valve. It installs outside the structure without a costly manhole, allows ground level maintenance, attaches to SCH40 PVC, and supports installations up to 12' deep.