


- Description
Harlequin CAP9 Sewage Treatment Plant – 4 to 9 Person Capacity
The Harlequin CAP9 is a compact, continuous-aeration treatment system engineered for domestic installations of up to 9 occupants (approx. 7 bedrooms). Its innovative bio-media design delivers 96.2 % pollutant removal while avoiding blockages common in fixed-film systems. Moulded from durable MDPE and certified to EN12566-3, it offers quiet, odour-free performance and low maintenance requirements.
Key Features and Specifications
- Population served: up to 9 (7 bedrooms)
- Pollutant removal: 96.2 %
- Material: Medium density polyethylene (MDPE)
- 110 mm inlet/outlet connections + service duct
- Integrated lifting eyes for ease of installation
- Externally housed air blower for quiet service access
- 450 mm flush-fit pedestrian duty manhole cover
- No moving parts or electrics within the tank
- Virtually silent operation
Performance and Maintenance
The CAP9’s self-cleaning bio-media maintains efficient oxygenation and biological breakdown without clogging. Routine desludging intervals are extended, and access to the diffuser is simple through the manhole cover. Its lightweight design simplifies handling and reduces installation costs on restricted sites.
Applications and Usage
Suited to domestic properties, holiday homes and small developments off mains drainage. Install on a level base and connect to a compliant soakaway or discharge point. All work should follow Building Regulations Part H and Environment Agency guidelines.
Learn more about Harlequin products here.
- Guides & Specification Sheets
- Delivery
There may be an additional charge for delivery of items outside UK mainland and offshore addresses; under these circumstances, please contact us for an updated quote on delivery before placing your order. Further payment may still be required for larger items – Please get in touch with us and we can arrange an updated invoice to reflect this. Your purchase with us will be held and stock allocated.
This includes Scotland, the Highlands and Islands, Northern Ireland, the Isle of Wight and the Isle of Man.
Postcodes including (but not limited to) DD, PH, IV, KW, HS, AB, PA, KA, ML, EH, KY, FK PO (PO – Isle of Wight) and G.
If access to the delivery address is restricted, please advise when placing the order. This will allow us to arrange for a suitably sized delivery vehicle. The customer is responsible for arranging for large items to be offloaded from the delivery vehicle at the customer’s premises. Please allow up to 10 working days for delivery.
Our suppliers arrange delivery at the source, so carriage charges may vary based on your postcode. We will happily provide you with a delivery quote; just call us on 01722 442446.
Next-Day Delivery is not Guaranteed – The order Cut-off for Qualifying next-day delivery addresses is 3pm. But please contact us as some orders can still be fulfilled after this time.
- Returns Policy
In accordance with United Kingdom and European law, customers have an unconditional right to cancel an order for a full refund from Tank Services up to 14 days after the goods are received by you.
If a customer wishes to return an item and cancel an order with Tank Services, please contact us within the period outlined above to arrange for the goods to be returned at cost to you. It is not Tank Services’ responsibility to pay for the return of your goods (see T&Cs for more information ).
Please take care when ordering the correct product, as the cost of returning tanks and bulky goods can be expensive.
It is the customer’s responsibility to ensure that good care is taken of the goods whilst in their possession. Goods must be returned to Tank Services in a suitable resale condition and unused as determined by the Supplier. Please see our standard Terms & Conditions for further details.
For BUSINESS Customers & Bespoke items; any refund will be less an administration fee of 20% + VAT of the total order value.
Harlequin CAP9 Sewage Treatment Plant (4–9 Person)
Postcodes within M25 will incur an additional £150excess charge. which will need paying before dispatch 3-4 week Lead TimeDelivery to Kerbside via 45 ft lorry (customer responsible to offload)
- Enquire About Stock or Availability
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