4 " Overflow Siphon by Graf 000 gal @ 5.33 gpm providing long-term

providing long-term

requires (4) AAA alkaline batteries

to be used as a post-filter for gravity water filter systems and in most 10" pressure filter housings

4) 21" (533

4 " Overflow Siphon by Graf 000 gal @ 5.33 gpm providing long-termGraf Overflow Siphon GRAF 330108 Since particulate contaminants such as pollen tend to float to the water's surface, removing the floating layer of surface pollutants through regular overflow from the tank is conducive to maintaining high quality water and a clean tank environment. This in line design overflow siphon creates a skimmer effect at the max tank level to remove surface particulate, ejecting it with the tank overflow.