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"And so when an explosion occurs, a 250-lb. manhole cover can get blown up into the air, land on top of a building, on top of a car, or on top of a human being." 

Glen Bertini, CEO, Plenovo
"Kent company grounds flying manhole covers"

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Why PreVent®

An estimated 11 manhole events happen every day across North America. These smoking manholes, manhole fires, and manhole explosions are increasing as utility infrastructure ages, causing significant network damage and costly outages. A single manhole explosion can cost a utility more than $1Million.

Read more about current manhole event mitigation on T&D World >

The fire department stands by at the scene of a manhole fire in Manhattan.

Impact on Utilities

Direct Cost:

Indirect Cost:

Although the combined costs impact utilities’ staffing and budgetary resources, the degration in public perception harms the brand, which can be difficult to regain over the long term.

Current Approach

Some utilities have tried vented manhole covers only to see their problems increase as damaging water flows into underground structures. Other utilities seek to minimize damages from a manhole event by securing or tethering their manhole covers. However, these solutions fail to address the root causes of manhole events. Typically, manhole events are a result of a chemical explosion caused by deteriorating underground cables in vault environments where saltwater and debris accumulate. Locked or tethered manhole covers do not stop these events from happening.

Stopping Manhole Events Before They Happen

PreVent® is a holistic smart solution designed to help utilities protect people and property from dangerous manhole events. PreVent® patent pending technology improves public safety and network reliability by actively stopping manhole events from occurring. Our cloud-based wirelessly connected design monitors the accumulation of combustible gases, reducing the risk associated with secondary cable failure, and provides data analytics for smart asset management.

Talk to a PreVent® specialist today to discuss your specific needs and create a customized plan.

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PreVent is the only solution that actively prevents fires and explosions improving public safety.

qualifies as a capital expense and requires no costly retrofitting.

“While others address the question of how to keep manhole covers from going airborne during a manhole event, we challenged ourselves to prevent manhole events in the first place. PreVent hatched from that simple vision.”

Glen Bertini
CEO, President & Chairman

There are at least
2 million
electrical manholes in the U.S., and more than
secondary network manholes in the northern U.S. alone.

Webinar: Causes, Consequences, and Protecting Your System from Manhole Events

This on-demand webinar will take you step-by-step through the causes and consequences of manhole events — and how to accurately detect and prevent them.

Watch now

Secondary manhole events cost U.S. utilities an estimated
$150 Million
per year.
There are approximately
secondary manhole events in North America each year—that’s
11 per day!