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18-25 Person Sewage Treatment System

Our 18–25 person sewage treatment plants are ideal for larger residential properties, commercial buildings, holiday accommodation, and small developments without access to mains drainage. Designed for higher wastewater capacities, these systems deliver reliable and efficient sewage treatment for demanding domestic and commercial applications.

Manufactured from durable, high-quality materials, our sewage treatment systems are built for long-term performance, easy installation, and low maintenance. Perfect for rural and off-grid locations, they help ensure compliance with UK wastewater and environmental regulations.

Browse our range of 18–25 person sewage treatment plants to find dependable, energy-efficient solutions for effective wastewater management.
15 products
 

FAQs

Got questions? We’ve got the answer...

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.

No problem! Here are a few ways we can assist you:

Live Chat: Click the chat icon on the bottom right of the page to speak with our team instantly.
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.