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Ideally suited for waste
OSMA RoundLine offers you a classic half-round profile ideal for domestic buildings
Pre-fitted spigot allows seamless system extension via solvent-weld joints
It serves as a termination point for the soil stack
61mm Osma SquareLine Outlet Adaptor - Wavin (White) - 4T837W trade deals Ideally suited for waste4T837W Wavin Osma SquareLine 61mm Outlet Adaptor (White) OSMA SquareLine gives you a smart, efficient rectilinear profile gutter system ideally suited for domestic buildings. SquareLine is a square 100mm (4") gutter system with square 61mm downpipe (or 68mm circular pipe via an adaptor) available in black, white and brown colour options. SquareLine is fitted with a Flexiclip seal jointing mechanism, making it easy to connect gutter to fittings.