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The Tricel Maxus Combi 4A is a high-performance, in-ground wastewater treatment system designed for applications serving 75 Population Equivalent (PE). Ideal for housing estates, hotels, restaurants, campsites, schools, and other commercial or community settings, this all-in-one solution combines a septic tank, buffer tank, biological treatment zone, and clarifier into a single compact unit.

This system is a simple Plug & Play, just connect the inlet, outlet and power supply!

Powered by Submerged Aerated Filter (SAF) technology, the Maxus Combi 4A delivers exceptional treatment efficiency with low operational costs. The system automatically adjusts to incoming flow rates, making it perfect for both seasonal and continuous loads. It includes the Tricel E-VI controller and a pre-installed GSM module for remote monitoring and peace of mind.

Examples of usages for this system include:
- Camp Sites / Glamping Sites
- Garden Centres
- Golf Clubs
- Zoo's / Animal Parks
- Care Home
- Hotels
- Supermarkets and Retail Units

These highly versatile systems are individually sized to suit every scenario over 75 population equivalent.

What is the difference between Model A and Model B?
The difference between the Tricel Maxus Combi 4A and Tricel Maxus Combi 4B lies primarily in their invert levels and installation suitability.

A - Standard installations where the system is placed low in the ground. Suitable when wastewater can gravitate to the system or be pumped in

B - Low-invert installations. Ideal for sites where water cannot gravitate to Model A but can flow naturally to Model B without pumping

Choose Model A if your site allows gravity-fed or pumped flow.
Choose Model B if your site has a low invert level and needs natural flow without pumping to the tank.

Overall Height (m) 2.42
Overall Width (m) 2.3
Overall Length (m) 6.975
Invert Level (mm) 520
Weight (kg) 1,950
Septic Tank Size (m3)  11.8
Buffer Tank Size (m3) 2.25
Power Consumption at max load (kWh/d) 6.3
Power Consumption at min load (kWh/d) 1.9
In-outlet Pipe Connection (mm) 160



Tricel Maxus Combi Brochure

Tricel Maxus Combi Installation Manual

Tricel Maxus Combi Service & Maintenance Manual


*Price excludes deliveries to the Highlands & Islands. This is POA so please contact us if required.
*All prices are for supply only. The customer must have appropriate offload facilities on site.

Need help selecting the right system? Call our expert team on 01388 537 050 or email us with your requirements – we’re happy to help.

SKU:TricelMaxusCombi-4A

Free Delivery is available to majority of the UK Mainland (excluding Scottish highland postcodes starting with PA, IV, AB and KW) and is subject to suitable access for a large goods vehicle artic / curtain sider. 


This product is delivered to the kerb and it is the customers responsibility to provide suitable mechanical offloading facilities (eg. Loader or Excavator) to offload this tank safely. Please let us know if access is not suitable for an artic. If we can do anything to make your purchase more accommodating call our friendly team on 01388 537 050 or email sales@direct-drainage.co.uk prior to placing your order.

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