Manthorpe Plastic SmartDrain & SlotDrain Accessory Pack The SmartDrain Leaf Trap – supplied in the Accessory Pack – is an ideal way to prevent drains from becoming clogged with washed away foliage. Using a saw, simply follow the leader and guide at one of the ribs to cut out a circle and drop in the leaf trap on installation. The leaf trap sits just below the underside of the grate which prevents it from floating out of place in heavy rainfall. Also supplied in Accessory Pack are two end caps to dam off water at the end of a channel. To fit, simply slide into position, or if it must be fitted at the male end of the channel, remove the thinned tabs on the end cap using a knife or pair of pliers. Contents 2 x channel end caps. 1 x Lead trap. 1 x Fitting instructions.