Before installation ensure that any leaves and other debris are removed, and the gutters, downpipes and drains are clean.
It is important that the correct diameter brush is chosen for your gutters or drains. The brush must fit snugly in position without any gaps either side. If the brush is allowed to ‘rattle’, it will be much less effective and is likely to be blown out. If you measure the inside width of the gutter and it is, say 90mm, the correct diameter of brush would be the standard 100mm diameter.
The filaments at the top of the brush should extend slightly above the level of the tiles or slate.