These manhole inserts, also known as shields are manufactured from 18 gauge, 304 stainless
steel and have been proven effective in reducing or preventing surface
water infl ow 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 SS manhole inserts are a practical solution to expensive plant
expansions, new construction moratoriums or high sewage treatment
The manhole inserts include 2 valves, one for venting of gas and one
for release of water at a rate of not more than 5 gallons per 24 hour
Each insert includes a gasket made of closed cell neoprene and is
attached with a pressure sensitive adhesive. Each insert is equipped
with a heavy-duty polypropylene strap for ease of removal and installation.
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.