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Scrubber Dryers 101: Part 2 – Vacuum Unit, Squeegee and Collection Tank

Last month we looked at the clean water tank on our breakdown of the versatile floor cleaner, the scrubber dryers. In this month’s article we’ll be moving along the scrubber dryer to have a closer look toward the rear of the machine at the collection tank and the vacuum unit in it, and then at the squeegee that trails along behind the cleaner.

Collection Tank

Where the collection tank sits exactly can vary from model to model, but generally speaking they will be toward the back of the machine so they can be hooked easily to other machine components, such as the squeegee. Some models have internal tanks with a drainage tap at their base to allow for easy emptying of the tank, whereas others have a detachable unit that can be emptied like you would a bucket.

Vacuum Unit

Inside the collection tank is the vacuum unit. It is protected from water damage by a float valve that rises with the level of the water to the top of the tank and serves to automatically cut off power to the vacuum unit should the waste water fill the tank too much. This also works to let you know when the tank needs emptying.

The vacuum unit is connected through to the squeegee to enable it to collect the waste water.


Trailing behind the machine is the squeegee, the component by which the scrubber dryer collects the waste water up off of the floor. The vacuum unit provides the suction for this and the waste it gathers is sent by an intake tube back to the collection tank to deposit it.

The squeegee is specially designed to ensure that all waste water is collected no matter the unevenness of the surface being cleaned, or how many or how tight the corners you will come across are. The squeegee is usually one and a half times the width of the scrubber dryer, allowing it to more effectively collect waste as the machine moves along and turns around corners. Moreover, the squeegee is fitted to a free floating, adjustable outrigger that allows for increased maneuverability and automatically adjusts to any unevenness in the floor as it glides over it.


In our concluding article we will be looking at the control panel of the scrubber dryer, so be sure to return next month for our look at the final areas of this fantastic cleaning machine.

Whether you’re looking for a scrubber dryer for single use, or to purchase your own cleaning equipment, we have the right system for you here at Alpha Power Cleaners. As an accredited Karcher Premier Dealer, you can rest assured that we have the specialism and expertise to make sure you get the best equipment for your requirements.

Contact us today for more information, and a member of our friendly team will be happy to assist you.

Why choose us

80+ Years of Experience

From hot pressure washers to floor scrubber dryers - we know our cleaning equipment, and can help you make the right decision.

Free Site Surveys & Quotations

Our team offer free site surveys and quotes for all our machines. If you are not too sure what you need, or even if you don't know how to clean the area in question, we can help!

Fully Guaranteed Work

All our work is fully guaranteed, we maintain all our machines to the highest standard and ensure that every machine we hire out is fit for purpose.

Same Day or Next Day Delivery

We cover the Midlands and beyond, we are proud to say that we offer next day, or same day delivery across most of our machines for hire.

Karcher Premier Servicing Dealer

Being a Karcher premier servicing dealer, we have access to the latest machines and equipment. This also means that we are experts in everything Karcher.

Tennant Authorised Partners

We are now Tennant Authorised Partners across the East Midlands, this means we have access to the latest machines and parts.

Free Training

We provide free training for all our hire machines. No matter if you have never used one, we will show you how to use it and set it up on-site - so you are ready to go!

Fast Breakdown Repair & Servicing

If you have a machine with us, or one of your own - we provide breakdown repair and servicing across the Midlands. Need help? Contact one of our team today!

Flexible Hire Options

If you need a machine for one day, one week, or one month, we can sort out what is best for you. With several options for hire contracts, we have something suitable for everyone.

Our work process


Contact our team

Contact us to speak to one of our team, and tell us what you need. We have something for every situation, our team are experts and can tell you exactly what will work best.


Get valuable advice

We will advise what machine is best for you and your situation, taking into account the size and type. Then we can give you a quote over the phone.


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Confirm what day you would like your machine to be delivered, and your location - delivery is free of charge and we cover across the Midlands.



On the day we deliver your machine, we will ensure you are happy and we can then provide training for you, so you are confident using the machine.

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Repairs & Servicing
Same or Next Day Delivery
Delivery Across The UK
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Free Training & Setup

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