The Diamond DMC9 Domestic Sewage Treatment Plant, formerly known as the WPL Diamond, is the ultimate solution for properties ranging from 46 to 55 people, making it ideal for domestic homes, small rural communities, and even commercial businesses like campsites, industrial units, and country estates. Designed to handle the demands of modern living, this treatment plant offers a far more efficient and environmentally friendly alternative to traditional septic tanks.

One of the standout features of the Diamond DMC is its ability to process wastewater faster without the use of chemicals, resulting in a cleaner, safer final effluent that can be discharged directly to a drainage field or watercourse. Its discreet design also boasts the flattest lid to the ground, ensuring minimal visual impact on your property and blending seamlessly into any landscape.

Engineered for durability and ease of maintenance, the Diamond DMC offers a tank warranty of up to 25 years and a two-year warranty on the blowers*. With a longer emptying cycle of up to three years between desludges, you can enjoy peace of mind knowing that maintenance is minimal and hassle-free. The aerated process is odour-free, eliminating the need for primary settlement and ensuring that your property remains clean and comfortable.

Fully compliant with General Binding Rules and certified to BS EN12566-3 standards, the Diamond DMC is CE marked and built in the UK using the British Water Code of Practice flows and loads. Its robust construction from UV-stabilised glass-reinforced plastic (GRP) with an external gel coat finish ensures long-lasting performance, even in harsh weather conditions.

The Diamond DMC is designed for easy installation, whether in 'wet' or 'dry' ground conditions, and its compact structure means minimal excavation is required. Plus, with a range of invert depth extensions available (select from dropdown), you have the flexibility to tackle even the most complicated sites, allowing for various discharge options.

In short, the Diamond DMC9 Domestic Sewage Treatment Plant offers an efficient, low-maintenance, and eco-friendly wastewater solution that’s built to handle the demands of today’s modern lifestyle while blending discreetly into any setting.

Benefits of the Diamond DMC9 Domestic Sewage Treatment Tank (46-55 Occupants):

High-performance DMC range for 46-55 occupants
Durable GRP with UV stable gel coat finish
Compact design with flush-to-the-ground lid
Up to 3 years between desludging
Suitable for wet or dry ground conditions
Minimal excavation required
BS compliant & CE marked

Product Specifications:

Population: 46-55

Max Outside Diameter (mm): 3300

Height to Inlet (mm): 3140

Inlet Invert Depth (mm): 580

Height to Outlet (mm): 3040

Max Height/In Ground Depth (mm): 3750

Weight Empty (kg): 460

Total Capacity (L): 15038

Factory Fitted Invert Extension: Select from dropdown

Please note: Please ensure all necessary permissions have been granted and due consideration has been given to:

• Planning permission, building regulations, and other regulating or interested parties.

• Sizing of the plant is in line with the British Water Flows and Loads codes of practice.

*25 years warranty and two years for the blowers is subject to correct installation, consistent influent conditions and regular plant maintenance as per the manufacturers’ instructions.

Sewage Treatment Plants