Parson Manhole Inserts dramatically reduce the
high costs of treating water inflow and cleaning pipes.

PARSON MANHOLE INSERTS are manufactured from high density polyethylene and 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. PARSON MANHOLE INSERTS are a practical solution to expensive plant expansions, new construction moratoriums or high sewage treatment costs.

•NO VALVE method of ventilation available

•Single or double valve ventilation system available

•NO corrosive parts

•Easy installation and removal

•Requires no maintenance

•Dramatically reduce sewage treatment costs

•Keeps grit, sand, salt, chemical spills,
foreign objects, road oils, etc. from
entering the collection systems

•Cost-effective alternative to replacing existing
manhole covers with "water-tight" covers

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