W.J. Hatt are an experienced sewage treatment plant installer and septic tank specialist serving Oxfordshire, Berkshire & the surrounding counties. We design, supply & install foul water and surface water drainage systems of all sizes – from single homes to large estates and commercial sites.
Who we work with
Over the years, we’ve completed drainage & sewerage projects for a wide range of clients, including:
- Private homeowners (existing properties & new builds),
- Estates & landlords with multiple properties,
- Historic country houses & their grounds,
- Schools & community buildings,
- Farms & agricultural holdings,
- Stables, equestrian centres & polo grounds
- Holiday cottages, campsites & caravan parks,
- Pubs, cafés & farm shops,
- Breweries,
- And many more.
SEWERAGE & foul water SERVICES
As a specialist sewage treatment plant installer, we offer a full range of foul water services, including:
- Installation of new sewage treatment systems & drainage fields (soakaways),
- Replacement or upgrade of existing foul drainage systems,
- Repair of failing, leaking or inadequate pipe networks,
- Design &installation of pumping stations for untreated sewerage connections to mains drains (e.g. Thames Water)
- Smaller pumping stations to carry treated sewage for individual properties where gravity-fed drainage isn’t practical
However, if you’re facing a foul drainage or sewerage issue not listed here, please do get in touch – we’re always happy to provide advice and help you find the best solution.
Consultancy & suppliers:
We offer a full consultancy service, including design of the most appropriate wastewater system for your situation. This ensures that the installation is tailored to specific ground conditions and space restrictions. We also work with Claydon Environmental.
We work closely with leading manufacturers such as Harlequin Plastics, Marsh Industries, and Klargester (Kingspan), sourcing products directly from the best supplies and knowing that they meet the latest environmental standards. You can read more about our partnership here.
Stormwater & Groundwater Drainage
Proper stormwater and land drainage is essential to protect your property and prevent flooding. Our services include:
- Diagnosing & resolving stormwater drainage issues,
- Installing underground land drainage to remove water from saturated ground,
- Dredging, de-silting & removing weeds from ponds & lakes,
- Renovating ditches & culverts to restore natural water flow,
- Designing drainage fields (soakaways) for surface water discharge.
As before, if you’re facing a stormwater or land drainage issue not listed above, please do get in touch – we’ll be happy to advise and find the right solution for your property.
For example, when Oxford City Farm suffered severe flooding during September 2024’s heavy rainfall, our Managing Director Oliver Hatt met with the community growers to assess the problem. We helped them design a practical plan to improve site drainage and prevent future flooding – forming the foundation of their Flood Mitigation Project, which you can read about here.
Further information on drainage & flooding:
Over our 87 years of trading, W.J. Hatt has always dealt with drainage problems using a pragmatic approach. The addition of modern materials, resources and technology continues to make our drainage works ever more efficient. As flooding proves to be a pertinent issue in Britain, properly installed and maintained ditches, culverts and underground pipes become essential. Effective functionality is the driving force behind any successful flood prevention system and we pride ourselves on selecting the correct method of discharge for such large quantities of water in any scenario. Furthermore, drainage schemes must continue to work with as little maintenance as possible. When it comes to cost effective drainage solutions, there is simply no substitute for experience.