Water-Fed Pole (WFP)
A water-fed pole is a lightweight telescoping pole — typically carbon fiber, 20 to 45 feet long — with a soft brush and water jets at the tip, fed by a hose connected to a pure-water filtration system. The technician agitates the glass with the brush while pure water rinses away the loosened dirt, leaving zero mineral residue to dry into spots. When done correctly, windows, frames, and screens air-dry crystal-clear without ladders or squeegees.
In depth
WFP is the safest and most efficient way to clean second- and third-story windows on most homes. The technician stays on the ground, never leans a ladder against gutters or siding, and can reach angles that would be dangerous or destructive with traditional tools. The method is also faster: a skilled WFP operator can clean a two-story colonial's exterior glass in half the time it would take with ladder and squeegee. Combined with a TDS meter, a WFP system is the modern standard for professional window cleaning.
How this shows up on our jobs
Our water-fed pole system is the primary tool we use on every exterior window cleaning job in Madison. We only resort to ladders when a specific architectural detail demands it.
Services where this matters
Related terms
Deionized Water
Deionized water — often shortened to DI water — is water that has had essentially all of its dissolved mineral ions removed by passing it through specialized ion-exchange resin beads. Positive-charge ions (sodium, calcium, magnesium) are swapped for hydrogen ions, and negative-charge ions (chloride, sulfate, bicarbonate) are swapped for hydroxide ions. The result is near-pure H2O with a TDS reading at or near zero.
Reverse Osmosis (RO)
Reverse osmosis is a water purification technology that uses pressure to force water through a semi-permeable membrane so fine that it blocks dissolved minerals, bacteria, and most organic molecules while letting pure water pass. In pressure-washing and window-cleaning applications, RO is the second filtration stage: it takes municipal tap water from 250-400 PPM of Total Dissolved Solids (TDS) down to roughly 5-20 PPM before the water hits the deionization resin.
TDS (Total Dissolved Solids)
TDS stands for Total Dissolved Solids — the concentration of dissolved minerals, salts, and metals in water, measured in parts per million (PPM). A TDS meter is the single most important tool in professional window cleaning because it determines whether rinse water will dry spot-free. Standard Madison tap water measures roughly 250-400 PPM, which leaves visible mineral spots on glass when it dries. For streak-free, squeegee-free results with a water-fed pole, rinse water must be at or below 10 PPM, and ideally 0-2 PPM.
Soft-Bristle Brush
A soft-bristle brush is the wash head of a water-fed pole or the hand tool used to gently agitate a surface during cleaning without damaging the substrate. For glass, a double-row flocked nylon or hog-hair brush is standard. For painted siding, soffit, and screens, a rotary or flagged polypropylene brush of medium-soft density is the norm. The goal is always enough mechanical action to lift dirt from the surface without micro-scratching the paint, glass coating, or finish.
Ladder Stabilizer
A ladder stabilizer (sometimes called a standoff or wall extension) is a steel or aluminum arm that bolts to the top rails of an extension ladder, extending the contact points out past the gutters and spreading the load across a wider wall area. Without one, a ladder rests directly on the gutter — which bends the gutter, damages the drip edge, pinches the roof line, and creates a narrow two-point contact that can slide sideways. A stabilizer keeps the ladder off the gutter, distributes weight across a 48-inch span, and dramatically improves both safety and the homeowner's gutter.