This design of Bottom drain features an aerated dome; the aerated dome has a perforated rubber membrane. Not only does the aeration benefit your pond and your fish but it also helps with pulling debris into your sump making it more effective. The
aerator on this dome is a carefully perforated rubber membrane; This rubber membrane is inconspicuous when situated on the bottom of ponds. The aerator is fitted with an air input tee that will accept flexible airline with an internal diameter (ID) of 9.5mm.

This kit comes supplied with 10 meters of flexible clear PVC airline (9.5mmID-13mmOD)