ASP domestic sewage treatment plants

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The small domestic sewage treatment plant

The Rewatec ASP (formerly known as the Conder ASP) is a small domestic sewage treatment plant that provides superb value for money. With low installation and maintenance costs and a robust and durable design, the ASP is the perfect sewage treatment plant for homes and for smaller commercial projects. 

Available in polyethylene, with a very low footprint, the ASP sewage treatment plant services properties of up to 25 people. 

With over 6,000 installations already across the UK, the ASP is also considered one of the best domestic sewage treatment plants on the market today. 

Small sewage treatment plant


Example applications

  • single houses 
  • small communities or developments 
  • small commercial applications 


How does the Rewatec ASP work?

The Rewatec ASP is a package treatment plant. It is used to treat domestic wastewater and to provide a much cleaner effluent than a traditional septic tank

Installed as an activated sludge system, the Rewatec ASP comprises of a single tank. Within this tank there is an inner central biozone chamber and an outer settlement zone.  

Rewatec sewage treatment plant ASP operation

The wastewater flows into the tank and settles in the central biozone chamber. This is where aeration occurs through the central diffuser. 

The water then enters the outer settlement zone prior to discharge where a gravity or pumped option can be specified. Excess sludge is removed periodically by a local service professional. 

Rewatec ASP maintenance

We have a network of sewage treatment plant installers and service partners to maximise the life of your Rewatec ASP and to provide years of reliable operation.

Installation of the Rewatec sewage treatment plant ASP


Our Rewatec ASP warranty

Our experience in the industry allows us to give you a 10 year warranty for Rewatec ASP wastewater treatment plants and a 12-month internal parts warranty (extending to 5 years after the warranty is activated within 6 months of your delivery date).

Activate your warranty 


Rewatec 10 year warranty

CPD training course

Our 45-minute CPD certified course "An introduction to off-mains wastewater management" is ideal for Architects, Consultants, Engineers, Installers and Specifiers looking to learn more about what wastewater treatment is and why it is important, regulatory bodies and the current UK regulations, how systems are designed, and what systems are available.

Request a CPD course

Options and accessories

Personalise your Rewatec ASP to meet your site requirements, with our wide range of options and accessories.

Options and accessories for Rewatec ASP sewage treatment plants

Technical information

Designed, manufactured and tested in accordance with EN12566-3 and the British Water Code of Practice for Flows and Loads, the Rewatec ASP is suitable for properties of up to 25 people.

Rewatec ASP specification tables

Available products

All products are available for populations of up to 25 people.


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Free quote

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