10,000 - 20,000


DAF Model 10

Pre-Screen MIDI

Pre-Screen MAXI

De-Watering SP4000


The size and specification of wastewater treatment system you need is generally determined by the hourly flow rate (to ensure the system can cope with the throughout) and the loading (of Suspended Solids, Fats, Oils & Greases etc.).

For example; if your wastewater has a high loading then it may be recommended that you utilise a larger capacity system to ensure effective treatment can be achieved.

For flow rates of 10,000 to 20,000 litres per hour, we would recommend the following treatment systems:

DAF Model 10

The DAF Model 10 has the capacity to handle up to 20,000 litres of effluent. A step up from the Model 6, this model offers more for those with higher flow rates of wastewater. This model utilises dissolved air flotation technology to separate sediment such as Total Suspended Solids from water.

The second of our DAF range, this model offers a balance of efficiency for those requiring a small to medium level of wastewater treatment.

To future proof your wastewater treatment, we would suggest an upgrade to our Model 20 which can handle a higher level of loading.


Pre-Screen MIDI

Watermark Projects Pre-Screen MIDI is the smaller of two rotary screening products we offer. The MIDI has a capacity of between 15,000 and 30,000 litres per hour, offering a full gross / large solids filtration system whereby sediment is filtered apart from your waterflow. The flow rate capacity will vary depending on the effluent it is treating. For example an FOG heavy effluent will likely have a lower capacity than an effluent with a high level of TSS.

Our rotary screens come with the option for a mounted steel base tank, or a high level mount placed on either a balance tank or platform with access steel.

The Pre-Screen MIDI is the answer to any stage one water treatment procedure required.

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Pre-Screen MAXI

Our Pre-Screen MAXI is the largest rotary pre screen system we offer. With a working capacity of up to 60,000 litres per hour this screen can deal with all manner of gross solids. While we would advice this figure can vary depending on the sediment, it has a potential of between 30,000 and 60,000 litres per hour. 

The Pre-Screen MAXI offers a bespoke primary solution to your wastewater treatment. 

WMP Pre screen MAXI

De-Watering SP4000

The SP4000 Dewatering Screw Press. Skid mounted and available with or without onboard polymer dosing.


If you’re unsure of your flow rate you can check your recent bills from your local water authority to see how much you are discharging per month. You can then determine your average flow rate by dividing this by your monthly operating hours but this will not highlight any peak flows which could impact the size of treatment system you require.