Drainage Rectangular Hopper and Grid - 110mm
|Guarantee||10 Year Manufacturer Guarantee|
|Specification||BS EN 1401-1|
It is good practice to ensure that any pipes that are being introduced into the hopper head are brought below the level of the grid. This is achieved by cutting a circular hole in the hopper grid.
The top section of any gully hopper should be at least 150mm below the damp proof course level.