Aquaknight Deck Drains are used as outlets/or overflow drains in conjunction with sheet, torch-on, hot mix or liquid applied waterproofing membranes in domestic and commercial applications. EXPLANATION: The Aquaknight Deck Drain is a hi-flow, uPVC or stainless-steel outlet with a stainless-steel clamping ring and polished stainless steel flat lid. The fittings have a clamping force suitable to seal all modern membrane installations.