October 12, 2026
Resource hub refresh puts expert technical advice at your fingertips
Insurance claims professionals now have faster access to the expert advice they need in...
Service videos
What is a backdrop manhole?
This Catalyst video shows how a backdrop manhole, or drop manhole, works.
It is a specialist manhole that channels wastewater from a higher elevation to a lower level over a short pipe run. A backdrop manhole stops wastewater from dropping quickly, eliminating turbulence and pressure in the sewer that could damage the pipe.
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