Commercial Sand Filter

New spiral cover system aids the operations of opening and closing. The air purge is built into the cover which can be efficient to release the air from the filter. The distance between the upper part of the sand filter layer and the diffuser head ("freeboard") has been increased to ensure greater distribution of water in the filtration phase and avoid sand being split into the drain during backwash. 

Commercial High Performance Sand Filter. D800 H1500 w/o valve