If I wanted to reach the top of the roof apex (near chimney) for a 2 storey house, would I need a 30 ft or 40 ft water fed pole?
I am thinking of getting this one will it work with any backpack?
https://www.amazon.co.uk/Window-Cleaning-Cleaner-Equipment-Photovoltaic/dp/B098QCN64L/?th=1
It's not the weight of the poles that is the issue here. It's the weight of the brush at the end that's the problem. How do you envisage assembling this pole to reach the height you want?
When we first started wfp we used Unger Teleplus aluminium telescopic poles with Vikan ovals. Those poles on their own were lite but when the brush was added they were very difficult to manage.
A backpack pump doesn't deliver much water in LPM. I very much doubt it would supply enough water to feed a brush with 4 jets. We have a Gardiner backpack on the van that wouldn't feed 4 x 2mm jets.
You are a new poster. Are you a window cleaner or are you an enduser looking to solve a problem?
If you are a window cleaner then I would suggest you invest in some decent equipment which is going to cost much more than the equipment you linked to.
If you are an enduser looking to solve an occasional cleaning problem, then I would suggest finding a window cleaner and paying him for the service is a more economical way of doing this long term. What happens if the longest pole setup you buy doesn't reach?
If you are cleaning glass, then you need a source of purified water as well.