4" Clean Check Extendable Backwater Valve | Agri Drain It is a practical choice

It is a practical choice where a deeper bury depth is needed for buried-line water access

This 30" collar fits on the outside of PVC or Corrugated Metal Pipe (CMP) and holds the grate flush inside the collar

PVC stoplog board with stainless steel hooks for strength and durability

Built to make stoplog installation

Injection molded for rugged durability and sized for standard Inline-style structures with inside dimensions of 14" wide x 16" depth

4" Clean Check Extendable Backwater Valve | Agri Drain It is a practical choicePrevent 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.