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Clearwater 79,000 Litre Septic Tank Underground Wastewater Treatment System

£18,426.58

(exc VAT)

£18,426.58

(exc VAT)

Quantity

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This product is delivered directly from the supplier, lead times vary.

 

The Clearwater 79,000 Litre Septic Tank is a high-capacity underground wastewater treatment solution designed for large residential developments, commercial premises, agricultural facilities, holiday parks, and other properties requiring reliable off-mains drainage. With an impressive 79,000 litre (79m³) capacity, this septic tank provides efficient primary treatment of domestic sewage, making it ideal for sites with high wastewater demands.

 

Manufactured to deliver dependable long-term performance, the Clearwater 79,000L Septic Tank is designed in accordance with BS 6297:1983 standards for septic tank installation and discharge. Its large-capacity design allows wastewater to remain within the tank long enough for solids to settle naturally, helping to reduce suspended solids before discharge to a suitable drainage field.

 

The septic tank operates using a proven single-chamber treatment process. Wastewater enters the tank where solids settle to the bottom and form sludge. Naturally occurring anaerobic bacteria begin breaking down the organic matter, while the clarified liquid effluent flows through the outlet pipe to a drainage field for further natural filtration. This simple yet effective process provides a cost-effective and reliable solution for properties that are not connected to the mains sewer network.

Suitable for a wide range of applications, including housing developments, farms, commercial buildings, leisure facilities, and industrial sites, the Clearwater 79,000 Litre Septic Tank offers a practical and durable wastewater management solution. For optimal installation, the tank should typically be located at least 7 metres from any dwelling and a minimum of 10 metres from nearby watercourses, while maintaining suitable access for desludging and maintenance vehicles.


Key Features

  • Massive 79,000 litre (79m³) capacity
  • Ideal for large residential and commercial developments
  • Designed for off-mains drainage systems
  • Complies with BS 6297:1983 installation and discharge requirements
  • Efficient single-chamber wastewater treatment process
  • Reduces solids before discharge to a drainage field
  • Low-maintenance and reliable operation
  • Suitable for domestic, commercial, agricultural, and industrial applications
  • Designed for long service life
  • Underground installation


Applications

  • Residential developments
  • Commercial premises
  • Farms and agricultural sites
  • Holiday parks and leisure facilities
  • Industrial buildings
  • Rural properties without mains drainage


 

The Clearwater 79,000 Litre Septic Tank is a robust, high-capacity solution for effective wastewater treatment and management. Combining excellent performance, large storage volume, and compliance with recognised industry standards, it is an ideal choice for projects requiring a dependable and efficient off-mains sewage treatment system.

 

18,000L - 79,000L Septic Tank Drawing
18,000L - 79,000 Installation & Operation Guidelines

SKU: TANSILACLE055

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CUSTOMER REVIEWS

Rated 4.8/5 by Direct Drainage Customers

Based on over 600 verified reviews

VERIFIED REVIEW

Very helpful from the start to the finish

Items were despatched quickly and arrived the next day. Would recommend.

Title

North Hayne Farm Cottages | 26 June 2026

VERIFIED REVIEW

Cheapest price I could find for the pump

Cheapest price I could find for the pump and delivery the next day what more could you want.

Title

Sam Jukes | 5 November 2025

VERIFIED REVIEW

Great service!

I ordered a septic tank it was delivered within a week and the delivery driver left it in the exact right place and time. Would definitely use this company again, thanks so much.

Title

Eve Harland | December 2025

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FAQs

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When will my order be dispatched?

Spare Parts Shipping
We ship in-stock spare parts the same day if ordered before 3pm. These orders are sent with DPD as standard and will be shipped on a Tracked Next-Day service.


Tanks & Supplier-Shipped Items

Tanks and certain spare parts are shipped directly from our suppliers. We aim to submit supplier orders to the supplier on the same day your order is placed to ensure prompt processing. 

How much is delivery?

Delivery costs vary depending on the type of product:

 

In-stock Spare Parts: £8.20 - shipped via DPD on a Tracked Next-Day service.
Supplier-shipped Spare Parts: £15 - dispatched directly from the supplier.
Tanks and Sewage Treatment Systems: Free Delivery to most mainland UK postcodes.

 

All delivery charges are calculated accurately at checkout.

I need help with placing my order.

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Call Us: Reach us at 01388 537050 during business hours for quick support.
Email: Send your query to sales@direct-drainage.co.uk, and we’ll respond promptly.

Do you stock all tanks and sewage treatment systems?

We do not stock tanks and treatment systems as standard. These are supplied directly from the manufacturer. The lead times of these systems will vary. If you need an accurate delivery date, please contact us on 01388 537050.

Are your prices inclusive of VAT?

It is important to note that all prices listed on our website exclude VAT. VAT will be calculated at checkout. 

I've found the same item somewhere cheaper, can you match the price?

We always aim to offer competitive pricing. If you've found the same item cheaper elsewhere, let us know — we'll do everything we can to match or even beat the price.

 

Contact us directly on 01388 537050 or drop us an email at sales@direct-drainage.co.uk.