Description The High Capacity Rainwater system at 160mm is the largest diameter gutter profile and is ideally suited to agricultural, industrial and commercial properties. The High Capacity system utilises 110mm, 160mm and 200mm round downpipe and fittings. This gutter adaptor is for an AC outlet and can be used on 110mm to 149mm. Highest capacity system. Robust rainwater drainage suitable for buildings with large roof areas. Practical and easy to install. Double seals on outlet, unions and angles for optimum performance. Integral flexible clips on all fittings for easy connection. Manufactured to the requirements of BS EN 607 & EN 1462.