Rotobrush Duct Sealing & Repair Nationwide

Rotobrush Duct Sealing & Repair: The Fort Lauderdale Owner’s Guide

If you’re running a Rotobrush system in Fort Lauderdale and the seal or repair component has failed, here’s the direct answer: we stock Rotobrush-compatible duct sealing and repair parts on our trucks, and most replacements run between $180 and $420 installed, depending on your unit’s series and what actually failed. We can usually get to you within a couple of days, not weeks. The way most owners discover this part is gone: the brush stops spinning under load, the vacuum seal lets go mid-job leaving fine dust hanging in the air, or the hose collar cracks and suction drops to the point where you’re pushing dust around instead of pulling it out. You’ll feel it before you see it – the system just doesn’t bite the way it used to.

Call (754) 354-9798

We’re an independent service provider in Fort Lauderdale, not affiliated with Rotobrush. That matters in your favor: we match parts by spec and measurement, not by brand loyalty, which means we’ll tell you honestly when an aftermarket seal kit does the job just as well for less money, and when it’s worth paying for the OEM piece. Dale Whitmore, the owner here at Kestrel Air Duct Fort Lauderdale, has a saying he uses with customers standing next to their own machine: “If you can’t see what came out, you don’t really know what got done.” Same logic applies to a seal – if you can’t see the damage, you’re guessing at the fix. We don’t guess.

Which Rotobrush Models This Applies To

Rotobrush has run several system lines over the years, and the sealing and repair components do not swap cleanly across all of them. The older units – the ones you’ll still find in a lot of Fort Lauderdale work vans and garage shops – use a screw-tight hose collar and a foam gasket at the drum connection. The newer AIr+ and brush head series run a quick-release collar with a silicone lip seal. They look similar from ten feet away. They are not interchangeable. If you try to fit a silicone lip seal onto an older threaded collar, you’ll get what looks like a seal and performs like a straw with a hole in it. Air leaks, suction dies, and you’re back to square one.

The right way to identify your part is the label plate on the motor housing, not the brush head. Write down the series number and the date code if it’s still legible. South Florida humidity eats those paper labels, so if yours is faded, measure the collar outside diameter with a set of calipers – 2.75 inches and 3.25 inches are the two common sizes we see in this market. Rotobrush OEM seals run higher than quality aftermarket equivalents, and in our experience the aftermarket silicone seals actually hold up longer in Fort Lauderdale’s climate because they’re less prone to drying and cracking than the original foam gaskets. We stock both on the truck, and we’ll show you the difference before you pay for anything.

Signs Your Rotobrush Duct Sealing & Repair Is Failing

• Suction drops off halfway through a job. The seal at the drum or hose collar has opened up, usually from repeated flexing in tight attic spaces. Air pulls from the leak instead of the duct, and your collection chamber stops filling.
• Fine dust escapes around the hose connection. You’ll see a light haze near the collar when the system is under load. That’s the seal failing in real time. Fort Lauderdale’s humidity makes that dust cling to walls and ceilings, which is how customers notice before you do.
• The brush head stalls or chatters against the duct wall. Worn drive components translate to uneven brush pressure. The motor’s fine; the coupling between the brush and the drive is slipping, and continued use will score the inside of the duct.
• The system runs louder than it used to. Air leaks whistle, and a damaged seal makes the motor work harder, which raises the pitch under load. If you hear a change in sound from one job to the next, something’s bypassing.
• Your collection chamber fills slower at the same settings. Rotobrush systems pull a known volume of air per minute when sealed correctly. A lazy fill rate means the negative pressure is leaking somewhere between the brush head and the collection drum.

Replacement Cost & What’s Included

In Fort Lauderdale, most Rotobrush duct sealing and repair jobs run between $180 and $420 installed. The low end covers a single seal or gasket replacement: part, labor, and a system test afterward. The high end covers a full seal kit plus a brush head coupling, which is the repair we see most often on machines that have run hard through South Florida’s summer humidity for more than three years. The range depends on your series, what actually failed, and whether we’re replacing one component or rebuilding the connection points.

You get the price in writing before we touch the machine. That’s the Kingswell Guarantee, and it’s been the standard since 2004: a written price, an arrival window we hold, a clean work area, and a written guarantee on the repair. If the fix fails within a year, we come back and make it right at no charge. Free second visit, in writing. Not a courtesy. A commitment. Most estimates are broken down by part and labor so you see exactly what you’re paying for.

DIY or Call Us?

The honest split: rotating brush equipment is not a high-tension spring or electrical hazard, but it is a precision air-sealed system, and a bad seal job is worse than no seal at all. What you can safely do is inspect: run a flashlight over the hose collar, check the gaskets for visible cracks or flattening, and note any dust accumulation around connection points. Those are diagnostic steps, not repairs. Where DIY goes wrong is forcing a near-match aftermarket seal onto a series it wasn’t built for. You’ll pinch the lip, the leak returns within a few weeks, and now the motor has run under load for a month with compromised airflow. That’s the repair bill going up, not down.

If you’re in the Fort Lauderdale area and you want it done once, call us at (754) 354-9798. We’ll match the part to your series, install it, test the system under load, and hand you a written price and a written guarantee before we leave.

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