Home Page

Over 40,000 WPL Diamond installations worldwide

Our WPL Diamond compact package wastewater treatment plant is suitable for domestic and small commercial properties in all ground conditions where mains drainage is unavailable.

So simple

Unlike traditional septic tank systems, modern package wastewater (sewage) treatment plants are better designed for todays’ increased volume of water usage in everyday life. Our WPL Diamond meets this growing demand and has an added advantage of a high quality process for wastewater (sewage) treatment, in a compact, single tank. Easy to install and maintain, our WPL Diamond range offers a longer term cost-saving solution.  

So reliable

With over 40,000 successful installations worldwide, we offer you a 25 years tank warranty with each WPL Diamond sold, backed up by our recommended list of independent network of experts who can install, service and maintain your plant.

So discreet

Our WPL Diamond DMS (1 up to 20 people occupancy equivalent) and DMC (21-55 people occupancy equivalent) ranges are compact, odourless and entirely hidden below ground. With the flushest lids on the market, you won’t even know it’s there!

Diamond DMS (1-20 people) Diamond DMC (21-55 people)

Image of a WPL-Diamond-small-sewage-wastewater-treatment-plant-for-off-mains-drainage-the-flushest-lid-on-the-market-so-discreet.

Show me the tank

Easy to install…

Easy on the eye and landscape

Our WPL Diamond plant is entirely underground with the flushest lid on the market, ensuring minimal visual impact to your beautiful garden or surrounding landscape.

Minimal disruption to your daily life during installation

Our robust WPL Diamond plant is compact in design, keeping the excavation to a minimum and the installation simple.

25 years warranty*

The WPL Diamond comes with 25 years tank warranty and a process performance guarantee for the life of the tank. The warranty of the air blower (housed in the kiosk) is 2 years.

Environmentally Compliant

Our high quality WPL Diamond range is CE marked, fully type tested and certificated in accordance with the mandatory European standard BS EN12566-3 2014 for small wastewater treatment systems. Performance tested at an independent accredited facility in Germany.

*subject to correct installation, consistent influent conditions and regular plant maintenance as per the manufacturers’ instructions.

Success Stories

Latest News

WPL Diamond standards

BS EN 12566-3

CE marked, fully type tested and certificated in accordance with the mandatory European standard BS EN12566-3 2014 for small wastewater treatment systems.

LABC approved

LABC approved England and Wales, which means the WPL Diamond has been assessed against Building Regulation requirements and can be installed without the need to have it signed off again by building control.

Part H2 for building regulations

The WPL Diamond is fully compliant in the UK with HM government guidance for Drainage and Waste Disposal, Part H2 for building regulations of wastewater treatment systems.

General binding rules

Our WPL Diamond range meets current legislation for exemption from a permit to discharge by the Environment Agency (EA), England, as per the General Binding Rules document.

British Water Flows and Loads code of practice

The WPL Diamond  is designed using the British Water Flows and Loads code of practice, to ensure correct sized tanks.

UK & European patented

The original WPL Diamond is UK patent and European patented. This means that our design is completely unique. Patent number: GB 250337.

Accredited ISO 14001

ISO 14001 – Recognised for our Environmental Management System compliance.

Accredited ISO 9001

ISO 9001 – Recognised for our Quality Management System requirements for all areas of the business.

Accredited OHSAS 18001

OHSAS 18001 – Our mission is to ensure that we enforce standards with our Occupational Health & Safety Management System.

British Water Packaged Treatment Plant (PTP) Focus Group

WPL Technical Director, Andrew Baird is the convenor of British Waters’ PTP Focus Group, which has been formed to provide input to the continued development of British and European Standards.

The group also promotes good practice in design, installation and maintenance of package wastewater (sewage) treatment plants up to 50 population equivalent. 

WPL is also a member of British Water Trade Association for the UK Water and Wastewater Industry.

Ideal septic tank replacement

WPL Diamond package wastewater treatment plant has more discharge options.Product-image-of-a-WPL-Diamond-DMS-compact-sewage-and-wastewater-treatment-plant-for-domestic-off-mains-drainage

From 1st January 2020 (or before if you are selling your property), a septic tank must be upgraded if it is currently discharging to a watercourse. This is due to a high pollution risk to the environment because of the poor quality of wastewater that it emits.

The WPL Diamond has an added advantage of a high quality process in
a compact, single tank which is easy to install and maintain.

For more information please read the General binding rules: small sewage discharge to surface water.

Composites UK

WPL is a member of Composites UK, an accredited trade association for the UK composites industry, promoting the best practice use of composites materials.

Royal Institute of Architects (RIBA)

WPL present RIBA accredited CPD seminars on wastewater treatment to architects and civil engineers. RIBA champion better buildings, communities and the environment through architecture.

Investors in People

Investors in People is an internationally recognised accreditation for our standards of better people management.

X
- Enter Your Location -
- or -