What you’re doing today

You’re learning the WFP lane: when it wins, when it loses, and how to run it so the glass dries spot-free.

VIDEO: https://www.youtube.com/watch?v=GNkP5djASNc | Water-fed pole window cleaning example (real jobsite). VIDEO: https://www.youtube.com/watch?v=1f6NJuUiWpU | Short WFP clip (Gardiner). Watch brush control + rinse.

Why this matters

WFP wins on:

safety (less ladder)
consistency
premium positioning

But only if your water is actually pure.

Tools & materials (minimum viable)

TDS meter (non-negotiable)
RO/DI system
WFP pole + brush

Step-by-step: WFP startup check (foreman routine)

Measure TDS (in → out).
Flush/prime.
Inspect brush (no grit).
Clean top-down.
Final rinse pass.
Verify dry-down.

Decision points

If TDS is high:
- stop and fix water quality before promising spot-free.
If frames bleed oxidation:
- switch method or set expectations.

Common mistakes + fixes

Skipping TDS checks
- Fix: treat TDS like fuel gauge.
Not doing a final rinse pass
- Fix: rinse discipline is the product.

What good looks like

Consistent spot-free dry
Less ladder risk on standard second-story exteriors (where feasible)

SOPs

WFP SOP: 04_sops/windows/wfp-window-cleaning-sop-v1.md
RO/DI build: 04_sops/windows/ro-di-system-build-sop-v1.md
RO/DI overview: 04_sops/windows/ro-di-water-system.md

Do this next (assignment)

Record 3 TDS readings (tap, post-RO, post-DI).
Clean 2 windows (shade + sun) and verify dry-down.

References

Hard water/minerals: 02_chemicals/pages/hard-water-and-mineral-stains.md
Oxidation risk: 02_chemicals/pages/paint-oxidation-and-finish-risk.md

Printables

Operator Checklist Pack (truck copy): 03_curriculum/printables/operator-checklist-pack-v1.md

Field Guide & Interactive Calculator (tbsoftwash.com)

🪟 Pro Window Cleaning, Hard-Water Removal & 0-TDS WFP Guides:

Beginner's Guide to Traditional Window Cleaning Tools →

Commercial Storefront, Awning & 0-TDS Window Washing in Tampa Bay →

How We Remove Hard Water Stains from Glass →

Best Water-Fed Pole Hose Guide →

Gear Box (Amazon)

Traditional & Water-Fed Pole (`0-TDS`) Window Cleaning Kit

Max Water 4" x 40" 4040 Commercial Reverse Osmosis Membrane — heart of a commercial pure-water WFP cart.
PUREPLUS 10" Activated Carbon Block Pre-Filter (4-Pack) — strips municipal chlorine before it destroys your RO membrane.
Color-Changing Mixed-Bed Deionization (DI) Resin Refill + Hydronix 10" Refillable DI Filter Canister — polishes water down to 000 PPM TDS.
Digital TDS Water Quality Tester Meter — verify 0–5 PPM output before touching glass.
Water-Fed Pole Window & Solar Washing Brush Head — agitates hydrophobic bird droppings and salt spray.
Gardiner Water-Fed Pole — lightweight rigid carbon pole for 2–4 story pure-water glass and frame scrubbing.
Ettore All-Purpose Squeegee (12-Inch) + Ettore Mighty Window Washer (10-Inch).
Ettore 43012 Extension Pole + Ettore 59090 Wrap-Around Flow Brush.
Arkwright Surgical Huck Towels — zero-lint detailing for edges, sills, and frames.
Dawn Ultra Dish Soap — clean squeegee glide without heavy residue.
Bar Keepers Friend Powdered Cleanser + Oxalic Acid 99% Powder — mineral and sprinkler hard-water spot restoration on tempered glass.

Disclosure: As an Amazon Associate, we earn from qualifying purchases.

🛡️ Module 5 Safety Gate — Traditional Windows & Pure Water (WFP / RO-DI)

Safety Gate Check

Pass this quick operator knowledge check (80%+) to verify SOP mastery and unlock your track certification.

1. What TDS (Total Dissolved Solids) reading is required after the DI resin vessel for spot-free Water-Fed Pole glass cleaning?

2. Why must hydrophobic frames and top seals be scrubbed and rinsed thoroughly before your final glass pass with a Water-Fed Pole?

Select an answer for all 2 questions, then click Verify Answers.

← Module 5 — Windows: Screens, Tracks, and Add‑Ons (Lesson)Module 5 — Windows: Pricing, Bundles, and Expectations (Lesson) →

Module 5 — Windows: WFP (Pure Water) + RO/DI Basics (Lesson)