Not necessarily. You can leave the black ripstop nylon air supply tube to the leaf blower long and place the leaf blower on the lawn behind you. Then you can reach the gutter with the Gutter Viper and walk along the below the gutter as far as you can in both directions to clean them. If you need to reach more gutter, then move the leaf blower so you can reach that section. This technique works well if you have no tree branches up against the side of the house. If you do have trees right next to the house, for that area you can hang the leaf blower from your shoulder (as shown in the video) and work with the black ripstop nylon tube length set to the same length as your telescoping pole.
Yes - if you can see and reach the leaves in the roof valley, the Gutter Viper will clean them. (Best to do this each year when the debris is dry.) Even houses with gutter guards can accumulate debris in their roof valleys and over their gutter guards. Wet debris will eventually corrode metal valleys and shorten roof life.
It's functional. It is a visual "telltale" that helps you check that the black ripstop nylon air supply tube is not twisted - when setting up the Gutter Viper as well as when using it.
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