Black water is dirty water with suspended solids that require particular attention in choosing the pump. For this application, submersible pumps with a retracted vortex impeller are recommended, ideal for avoiding the clogging of the pump. Submersible pumps with a built-in grinding system are particularly suitable for liquids with long and filamentary bodies or with large suspended solids.
To collect and convey the waste water into the sewer system, when the runoff cannot exploit the force of gravity, lifting stations for sewage with shredder are used. The lifting stations are units consisting of a tank and a submersible pump for moving the water.