One of the highest capacity uPVC domestic rainwater systems on the market. Revolutionary designed moulded water-tight seal and retaining clip pre-fitted for quick and easy installation. Benefits from extremely high capacity, so can cope with above average rainfall and large roof areas. Suitable for all properties old and new. Use with 65mm square line downpipe and fittings (can be adapted to fit 68mm round downpipe and fittings using square line black drainage adaptor Code 91358).