Fernco, Inc.

Large-Diameter Waterstops

Large Diameter Waterstops
help eliminate leaks around pipe entering manhole walls, yet are flexible enough to permit lateral pipe movement without destroying seal integrity. It is particularly useful for pipe to which concrete will not adhere, such as plastic pipe.

The waterstop is made of elastomeric PVC, is corrosion proof and is unaffected by acid or alkali, however the waterstop is subjected to many various conditions that are beyond the manufacturer's control. High ground water tables, quality of grout, workmanship and field conditions can affect its ability to seal. Discretion must be used in its application and installation.

Due to the many varying factors that can influence the waterstop's effectiveness as a seal, Fernco does not warrant this product as a positive water seal.

Large Diameter Waterstops for
Sewer Pipe 8" (203mm) and Larger

Order by specifying the outside diameter (O.D.) of the pipe which is to receive the waterstop. Minimum size: 8.5 inches O.D. (55.6mm O.D.)

How to Install:

Slide custom waterstop over clean end of entrance pipe.
Position waterstop on centerline of manhole wall.
Tighten the stainless steel band to 60" lbs. torque.
Stainless steel band is furnished with the waterstop.
Grout around the waterstop as normally done to close an opening in a concrete wall.

For waterstops smaller than 12", see Concrete Manhole Adapters