These manhole inserts, also known as shields are manufactured from HDPE and will not
rust or corrode. They have been proven effective in reducing or
preventing surface water inflow to the collection system, through
the manhole lid.
Operating, utility and maintenance costs for plant equipment and
pumps are minimized, due to reduced flow during heavy rainfall.
These HDPE manhole inserts are a practical solution to expensive
plant expansions, new construction moratoriums or high sewage
HDPE meets the requirements of ASTM D-1248, Class A, Category
5, with a finished thickness of 1/8 inch.
The manhole inserts include 2) 3/16" vent holes which release
liquid at a rate of not more than 5 gallons per 24 hour period.
Each insert is equipped with a heavy-duty polypropylene strap for
ease of removal and installation.
You must specify measurements when you order these items because Protectors are custom designed per your measurements, and they and are non-returnable!
Reference the Dimensional Chart here when you place your order online, simply add the dimensions in the Comments field of the shopping cart. If you have any doubts or concerns, please call Tech Support at 800-437-1146.