Choose a water-fed setup for your water and working height.
Measure tap-water TDS, monthly pure-water use and the highest glass. Those numbers show whether to start with DI, compare RO/DI, or solve the pole first.
If those three measurements are missing, product comparisons start too early.
Before you buy
Do not size the rig from pole length alone.
Filtration, brush-end flow, hose, working reach and transport have to fit the same route. A strong pole cannot rescue an undersized water system—or a system that never fits the vehicle.
Separate loose debris from bonded grime, match brushes and vacuums to the exact window, protect drainage openings and stop before unapproved lubricant.