4"or110mm Aerated Bottom Drains For Concrete Ponds  Ref: 22
	Fabricated Bottom Drain - Sump Details Sump Outside Diameter 250mm Sump Wall 7mm (approx) Sump Flange Diameter 350mm 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 (1½ Pressure Socket) Water outlet 4" with 1" Inlet for Air Hose or 110mm with 40mm Inlet for Air Hose All above Sockets are Pressure Rated