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Manhole Access
When considering what manhole cover and frame to install at the top of a manhole, here are some suggestions: Does it need to be watertight? Should it be locked down for safety or security? Are there concerns with corrosion, rusting or binding? Will it be installed in a location where it has to be hand-carried? Hamilton Kent's product meets all of these needs and more. Check out The Lifespan System!
Solving I/I: A new approach to manhole remediation
In this webinar, Henry Flattery looks at how municipalities can solve inflow and infiltration problems at the top of the manhole with Hamilton Kent’s newest product, the Lifespan System.
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The Lifespan System®

The Lifespan System® is a watertight, corrosion-proof, non-conductive, locking rubber manhole frame and cover system that prevents rain derived inflow from entering sanitary sewers through the top of the manhole.

Solve infiltration problems caused by traditional manhole covers
Find out how to eliminate inflow and infiltration through manhole covers and frames, how to increase connection capacity and save money by not conveying and treating unnecessary water.
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The City of Naperville puts the plug in inflow and infiltration
Naperville’s traditional cast iron manhole covers wouldn’t seal. The Lifespan System helped eliminate inflow and infiltration. Download the case to read more.
Download Now. Click here  >>
Related Resources
The Lifespan System®
Installation Video
The Lifespan System®
The Lifespan System®
Fact Sheet
Lifespan System® Interview
with Henry Flattery at
No-Dig 2011
Le Système LifespanMD
Lifespan System®, Espanol
HK News & Events
A watertight solution
for WSSC
Lifespan is specified to rehabilitate manholes in environmentally sensitive areas in Maryland.
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