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GRAF

Discover the full range of GRAF One2Clean sewage treatment plants at Direct Drainage, engineered to deliver exceptional wastewater treatment performance with low running costs and minimal maintenance. Designed for off-mains properties, rural homes, self-build projects, and small commercial applications, the One2Clean range provides a reliable and environmentally responsible solution for domestic sewage treatment.

 

Utilising advanced SBR (Sequential Batch Reactor) lifting technology, GRAF One2Clean systems achieve outstanding treatment efficiency, removing up to 99% of pollutants and producing a high-quality treated effluent suitable for discharge, subject to local regulations. Independently tested and CE certified to EN 12566-3, these systems are designed to meet stringent wastewater treatment standards while offering reliable long-term performance. Each plant features a robust injection-moulded tank, quiet operation, and a convenient plug-and-play design, eliminating the need for complex on-site wiring and helping to simplify installation. For added peace of mind, every system includes free commissioning by an approved GRAF UK service provider and is backed by a 10-year tank warranty.

 

Available in a range of capacities to suit single dwellings and larger households, the GRAF One2Clean collection offers gravity and pumped outlet options, along with riser extensions for greater installation flexibility. Whether you're replacing a septic tank or installing a new wastewater treatment system, GRAF One2Clean sewage treatment plants provide an efficient, durable, and compliant solution. At Direct Drainage, we offer competitive pricing, expert technical advice, and fast UK delivery across the complete GRAF One2Clean sewage treatment plant range. Browse the collection today to find the ideal domestic sewage treatment solution for your project.
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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.