...so do you have to first fill the pack with pure water and how does the water shoot up the pole if there's no pump attached?
You must have to fill it with pure water and I'm fairly sure you have to pump it with the handle to build up the water pressure; then use as normal.
I think Matt has used a system like this before. I think he said he'd arms like Popeye after using it.
Indeed i did, i have used mine to about 10 M high (2nd storey) it works well, pump the handle for a few pumps, then the pressure is in the backpack, then use as you would normally
on first floor windows its alot easier as you can pump and spray, BUT on 2nd floor windows you really need 2 hands to control the pole
its a very cheap method on entry
REVIVE-A-DRIVE i just brought a HOZELOCK micro pipe tap connector and it did away with the bit of hosepipe and hozelock connection, so i just attached the micropipe straight to the backpack