Repairs, Installations, Maintenance, Unit Upgrades, Motor Burn-Out Insurance Claims, Sales & Accessories... For All Brands of Central/Ducted Vacuum Systems!

All ducted Vacuum Systems are comprised of 4 critical elements – Inlet / Ducting / Filter / Motor.


The system is turned on/off by inserting/removing a hose into/out of a hose inlet or by activating a switch on the hose, floor inlet or auxiliary hose.


Ducting / Piping

Ducting is usually installed during construction but may also be installed into existing homes. It is important to ensure that the pipe run lengths are minimised, the correct type of fittings are used, and that strict procedures are followed when cutting, installing and fixing ducting.

Amongst many others, good piping design and installation should include these factors:

Every fitting (bend, elbow, tee, junction) has a different defined representative length which must be added to the total length of piping for determining power unit selection. Vertical-up pipe runs are calculated differently to vertical-down pipe runs. Short bends should never be used at any point other than at the inlets. Sweep bends should never be used at the inlets. Only pipe-cutters should be used for pipe cutting, not hacksaws. Only the male side of any fitting should receive PVC weld adhesive and bell ends of pipes should always orientate against the airflow direction.



All ducted vacuum motors are designed to handle only Clean Filtered Air. All ducted vacuum systems thus feature a Filter or a combination of Filters – Cloth, Steel Screen or Paper. The incoming air may also be subject to Cyclonic Filtration before the Filter and thus reduce the role of the filter and lessen the frequency of cleaning or replacing the filter.

Each Filter creates an impediment to the airflow and the different filter types will affect airflow differently. Further as a filter is used over time, it will need to be cleaned or replaced. There are no ‘self cleaning filters’ and ALL filters need to be replaced or cleaned to remove embedded dirt.

The easiest system to clean is a Disposable Bag System, whilst the most difficult to clean is a Permanent Inverted Bag ‘Self Cleaning’ System.



There are many types of Ducted Vacuum Motors. The most common types for Residential and Light Commercial Applications are Flow-Through, Peripheral Bypass and Tangential Bypass, each type has advantages and disadvantages.

Flow-Through Motors require a higher degree of filtration than do Tangential Bypass Motors. Flow-Through motors are normally quieter than Tangential Bypass Motors. Tangential Bypass Motors are often more durable than Flow Through Motors. There are also substantial differences in quality, durability and related Warranty between the different motor types and manufacturers.

Ducted Vacuum Motors are commonly either 145mm or 183mm in diameter and are configured with 1, 2 or 3 fan stages / turbines. Adding more stages increases Sealed Vacuum but decreases Airflow. Air driven Power Heads are best suited to motors with more fans/ stages.

Most Domestic Motors have wearable carbon brushes and premium quality motors will accept several brush changes. A power unit may be fitted with more than one motor.


If we can help you in any way, or if you have a querie please feel free to call 1300 vacumax / 1300 822 862.

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