Super Vac MA16-24 16 in Fan to 24 in Manhole Adapter

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Manhole Adapters are a great way for utility companies and more to place blowers/exhausters safely atop of manholes securely. These adapters allow negative pressure fans to pull smoke, toxic fumes and more from deep in the manhole. These rugged aluminum adapters come in 4 sizes and sit in manhole rings to provide a stable mounting surface for smoke ejectors or blower/exhausters.