Sealing waterproof manhole covers and frames to ensure facilities under the manhole covers are protected from contamination

Every batch of composite manhole covers and frames we deliver to our customers will undergo waterproofing and pressure testing.
Waterproof test: BETTER COVER composite manhole cover and frame adopt a sealed structure. Even if a flood occurs and the manhole cover is submerged in water, our sealed manhole cover can ensure that water will not penetrate.
Effectively protect facilities under manhole covers from contamination！