2" or 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