These are silt trap sediment catchment boxes for garage forecourt car wash bays. These traps catch the dirty sediment silt before entering the drainage system and most car wash bays should have sediment traps / interceptors installed.
Garage forecourt silt traps and intercepters should be kept clean at least on a 6 monthly basis.
We can fit and maintain silt traps ad interceptors we can also clear blocked drains and provide many other services for the commercial sector.