2"/63mm Aerated Bottom Drains For Concrete Ponds  Ref: 23
Fabricated Bottom Drain - Sump Details

Sump Outside Diameter 160mm
Sump Wall 3-4mm (approx)
Sump Flange Diameter 240mm
Sump Flange Thickness 6mm
Liner Ring Thickness 6mm
Self Tapping Screws for Flange Not Applicable
Base Thickness 6mm
Socket for Stem - Welded to Base 48.3mm
Water outlet 2" or 63mm
Inlet for Air Hose 1"
32mm or 40mm