Clarke Floor Scrubbers, Sweepers & Pressure Washers: 7 Questions Answered

What You’ll Find Here

If you’re looking into Clarke equipment—floor scrubbers, sweepers, pressure washers, or parts—you probably have questions. This FAQ covers the ones I hear most often, plus a few you might not have thought to ask.

1. Is Clarke just a floor scrubber brand?

No—and that’s a misconception I had myself when I first started reviewing equipment specs.

Clarke makes a full line of commercial and industrial cleaning equipment: floor scrubbers (walk-behind and rider), sweepers, pressure washers, and dust collection systems. I see a lot of buyers assume Clarke only does scrubbers, but their sweeper lineup is solid, and their pressure washers (including the LWQ series) are workhorses in industrial settings. I’ve reviewed purchase orders that tried to source a sweeper from one vendor and a pressure washer from another, when Clarke could have covered both with consistent parts support. That’s a fragmented approach I’d push back on in a Q1 audit—it increases administrative overhead and service complexity for no good reason.

2. How do I choose the right Clarke floor scrubber model?

Start with your facility’s square footage and aisle width—not brand preference.

Clarke offers sizes from compact walk-behinds (like the 20-inch models) to large ride-on units (36 inches and up). I once helped a warehouse facility pick a model for their 50,000-square-foot space. They wanted the smallest ride-on because it was cheaper. I ran a quick capacity calculation: their aisles were 8 feet wide, and they needed to cover the floor in about 4 hours. The small ride-on would have required two passes per aisle, adding about 40% to their cycle time (this was back in 2023). We went with a 34-inch scrubbing path instead. If you’re on the fence, look at your daily cleaning time budget first—that usually decides the size.

3. What about the LWQ pressure washer—is it worth it?

The LWQ series (Light Weight Quadraulic) gets talked up a lot, but I’d say it depends on your cleaning frequency.

In our 2024 quality audit of 200+ pressure washer units across different brands, the LWQ stood out for consistent pressure output (around 3,000 PSI) over a 6-month period. That’s solid. Where I see buyers go wrong: they buy the LWQ for occasional quarterly cleaning and then complain about the maintenance schedule. These units need regular pump checks (think every 100 operating hours). If you’re only using it a few times a year, a simpler, lower-maintenance model might be a better fit. The LWQ is a game-changer for regular use; for occasional use, it’s like buying a race car for your weekly grocery run (note to self: stop making car analogies).

4. Can Clarke supply parts for older, discontinued models?

Usually, yes—and this is a big reason I’ve stuck with Clarke for some of our longer-term clients.

The conventional wisdom is that manufacturers drop parts support after 5-7 years for older equipment. My experience with Clarke suggests otherwise. We’ve sourced replacement scrubber brushes and detergent valves for units that were 12 years old. It’s not a perfect record—some specialized electrical components are harder to find—but for a core set of parts like squeegees, brushes, and filters, Clarke’s availability is way better than what I’ve seen from other brands. If you’re buying used Clarke equipment (we do this for budget-strapped facilities), ask the seller for the model’s parts list and check current availability. That saved us from buying a machine that would have been a paperweight in 6 months.

5. What floor scrubber detergent works best for Janesville’s water conditions?

Janesville, Wisconsin (and much of the Midwest) has moderately hard water—that affects foam and residue.

I reviewed a contract for a Janesville facility that was using a generic detergent. We ran into issues: the water hardness (around 7-10 grains per gallon, based on local water reports) caused excessive foam and left a film on the floor after drying. The staff thought the machine was malfunctioning. It wasn’t—it was a chemical mismatch. Clarke’s own detergents are formulated for hard water, but you can also use a neutral pH detergent with a hard water stabilizer. Bottom line: if you’re in an area with hard water, don’t buy the cheapest detergent—it’ll cost you in rework time and floor damage. I’d recommend testing a small area first (like 200 square feet) before committing to a full purchase.

6. I saw ‘Clarke welder’—does Clarke actually make welding equipment?

No—not under the Clarke brand we’re talking about here. That’s a different company.

This is a confusion that comes up in search results. The Clarke brand for cleaning equipment (founded in 1946) and a separate company that makes welders and cutting equipment share a name but are unrelated. I’ve had vendors ask me if we also supply welders—I always clarify quickly. If you’re looking for welding equipment, you want the other Clarke. If you’re looking for floor scrubbers, sweepers, or pressure washers, you’re in the right place. (Seriously, I had to correct this twice in one week during a 2023 product catalog review.)

7. How do I verify that Clarke equipment meets my facility’s specs?

Request a written scope of work and a sample test run—don’t rely on spec sheets alone.

In my role, I review deliverables before they reach customers—roughly 300 items annually. One thing I’ve learned: a spec sheet is a starting point, not a guarantee. I once approved a Clarke scrubber based on its published 24-inch cleaning path. When the unit arrived, the actual effective path (adjusted for overlap) was 21 inches. That changed our coverage projections. The vendor corrected it at no cost, but it delayed our launch by a week. Now every contract I review includes a clause for on-site validation of key performance specs (cleaning width, run time, pressure output). If a vendor resists that, it’s a red flag.