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When it rains a lot, water needs a place to go, and that's where stormwater drains and systems come in. It provides access to the underground systems that help carry away excess water and prevent flooding. They enable workers to inspect the drains and ensure that there are no obstructions that can result in issues. Thus, manhole covers are preventing our streets from overflowing and making sure the water can properly drain away.

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4. Actuator This can be manual or automated. Manual actuators are operated with a handwheel, while automated versions may use electric, pneumatic, or hydraulic power.

In Australia, manhole also commonly refers to an access hatch used to get access from a room or hallway into the ceiling cavity of a building.^[3][4] These manholes are typically around 450 mm × 450 mm (18 in × 18 in) square.

Understanding Gate Valves with Integral Bypass

The round shape of manhole covers arises from a fundamental engineering principle stress distribution. When a load is applied to a round cover, the pressure exerted is distributed evenly across the entire surface area. This characteristic allows round manhole covers to withstand substantial loads—far more than their square or rectangular counterparts, which can create stress concentration points at the corners. Therefore, round covers are often more durable and require less frequent replacement, leading to cost savings for municipalities.