4"or110mm Aerated Bottom Drains for Ponds fitted with a Liner  Ref: 21
	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 Quantity 12 - 5.5 x 25mm Stainlless Steel Pozi Pan self Tapping Base Thickness 6mm Socket for Stem - Welded to Base 48.3mm Water outlet 4" with 1" Inlet for Air Hose or 110mm with 40mm Inlet for Air Hose All above Sockets are Pressure Rated