Septic Tanks & Off Mains Drainage Henley-on-THames
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Services we offer in Henley-on-Thames
Off-Mains Drainage Compliance Henley-on-Thames
Properties in and around Henley-on-Thames can have private drainage arrangements that need careful checking, particularly where homes are older, rural-edge, riverside, extended or set within larger grounds. Some properties may use septic tanks, while others rely on sewage treatment plants, drainage fields, shared private drainage systems or pipework that has been altered over time. Boxall Ward helps homeowners, buyers, sellers, estate agents, conveyancers, builders and property managers understand whether an off-mains drainage system appears suitable, serviceable and compliant. Around Henley-on-Thames, this can be especially important where drainage arrangements are close to sensitive land, watercourses, gardens, paddocks or rural property boundaries. A compliance check can help establish what type of system is installed, where it discharges, whether there are visible signs of failure and whether repairs, upgrading or further investigation may be required. For more information, see our dedicated page on off-mains drainage compliance.Septic Tank Installation and Replacement in Henley-on-Thames
Older off-mains drainage systems are not always suitable for the way a property is now used. A Henley-on-Thames property may have been extended, renovated, converted, modernised or brought into more regular use since the original septic tank or private drainage system was installed. Where a septic tank is damaged, undersized, poorly performing or no longer suitable for the discharge arrangement, replacement may need to be considered. Boxall Ward can advise on septic tank replacement and sewage treatment plant installation for properties in Henley-on-Thames and surrounding Thames Valley areas. A modern sewage treatment plant may be a more appropriate long-term solution where the existing system is no longer suitable, depending on the property, ground conditions, access, discharge options and compliance position. Boxall Ward is experienced in assessing off-mains drainage sites, planning practical installation routes and carrying out the excavation and groundworks needed for reliable replacement systems. The company is also a distributor of Matrix sewage treatment plants, giving customers access to modern treatment plant options for domestic and light commercial use.Septic Tank Repairs Henley-on-Thames
Not every septic tank or sewage treatment plant problem means the whole system needs to be replaced. Drainage issues can be caused by damaged pipework, blocked inlets or outlets, failed pumps, broken covers, treatment plant faults, poor maintenance or a drainage field that is no longer performing properly. Boxall Ward carries out off-mains drainage repairs for septic tanks, sewage treatment plants, drainage fields and associated pipework. For properties around Henley-on-Thames, this can be particularly useful where private drainage is hidden within gardens, land, driveways, outbuildings or rural access routes. The first step is to understand what is actually causing the problem. A repair-led investigation can help establish whether the system can be restored to proper working order, whether parts need replacing or whether a more substantial upgrade is likely to be required. Early investigation can also reduce the risk of a manageable fault turning into a more disruptive and expensive drainage issue.Septic Tank Survey Henley-on-Thames
A septic tank or sewage treatment plant can become a significant issue during a property sale if its condition, discharge route or compliance position is unclear. Boxall Ward provides homebuyer septic tank surveys for people buying properties with private drainage. For homes in and around Henley-on-Thames, a specialist survey can be especially useful where the property is older, larger, rural, riverside, close to sensitive land or has drainage arrangements that are not clearly documented. A survey can help identify the type of system in place, the visible condition of the main components, whether there are signs of failure and whether the discharge arrangement may need further attention. This gives buyers, sellers, estate agents and conveyancers clearer information before exchange, rather than leaving private drainage questions until after completion. Where necessary, Boxall Ward can also advise on repairs, replacement options, compliance concerns or further investigation.Groundworks Henley-on-Thames
Off-mains drainage depends on careful groundworks as well as the tank or treatment plant itself. Pipe runs, drainage fields, excavation routes, access for machinery, soil conditions and reinstatement all affect how well a private drainage system performs. Boxall Ward provides groundworks for septic tank installations, sewage treatment plant installations, drainage repairs and associated off-mains drainage projects. Around Henley-on-Thames, this may include work for larger gardens, rural properties, renovation projects, paddocks, private land, older homes and sites where access needs to be carefully planned. The aim is to install or repair the drainage system properly while keeping disruption to the surrounding property as controlled as possible. Good groundworks help ensure the finished system is practical, serviceable and suitable for the property it serves.Certified Installers Henley-on-Thames
Choosing the right off-mains drainage contractor matters, particularly where the system serves a larger home, a rural property, a shared drainage arrangement, a renovation project or a property being bought or sold. Boxall Ward works with established sewage treatment plant and drainage product manufacturers and can advise on suitable system options for the site. The company is experienced with products from manufacturers including Harlequin Manufacturing and Marsh Industries, and is also a distributor of Matrix sewage treatment plants. For Henley-on-Thames customers, this means Boxall Ward can help with both the practical installation work and the wider decision about what type of system is likely to be suitable. The right solution depends on the property, the number of occupants, available land, discharge options, access, ground conditions and any compliance issues that need to be resolved. Boxall Ward can assess the situation and recommend a practical route forward.More About Our Core Services
Areas We Serve In Thames Valley
If your area isn’t listed, we may still be able to do the work – just call us on
01903 815 377
and we’ll be delighted to discuss your needs and our solution.
| Newbury | Reading | Wokingham |
| Bracknell | Maidenhead | Windsor |
| Henley-on-Thames | Marlow | Ascot |
| Twyford | Wargrave | Crowthorne |
All Areas We Cover:
West Sussex | East Sussex | Surrey | Hampshire | Kent | New Forest | Thames Valley
Check out our Homebuyer Surveys (Septic Tank Surveys)
Happy Customers
Henley-on-Thames Off Mains Drainage FAQ
In order for wastewater to be taken away from your property, it will be connected either to a network of pipes leading to a main sewer, or to its own private drainage system, also known as off mains drainage. These properties are typically situated in more rural locations where a connection to a main sewer is not possible.
Your sewage treatment plant has to be 5 metres away from trees, fences and hedges, 10 metres away from a watercourse or stream, and 50 metres away from any lake or foreshore. Last but not least, it has to be 7 metres away from your housing and 4 metres away from a wall or a building.
Areas we serve include: West Sussex, East Sussex, Hampshire, the New Forest, Surrey, Kent, Berkshire and parts of Wiltshire and Dorset. If you are unsure whether we cover your area, please contact us and we’ll be happy to advise.
There are three different types of tanks:
- Septic Tanks
- Cesspits
- Sewage Treatment Plants
Septic tank:
A septic tank does not have any mechanical parts, and it doesn’t perform any ‘treatment’ of the waste. Instead, the waste enters the tank from the property, then separates into three different layers. The middle layer of separated waste water then leaves the tank, typically into a soakaway system.
A soakaway system is typically a network of slotted or perforated pipes, which allow the waste water to percolate through the sub soils without causing a pollution.
The remaining contents of the tank are then removed at regular intervals by a tank emptying company.
Cesspit:
A cesspit is literally just a holding tank for the waste from your property. Waste goes in and stays there until the tank is emptied. There is no treatment of the waste that goes in. A cesspit will need emptying on a regular basis.
Sewage Treatment Plant:
A sewage treatment plant is the most modern form of off mains drainage tank.
Powered by an electricity supply, a sewage treatment plant provides treatment of the waste. This means that the waste water that leaves the tank is cleaner than that which would come from a septic tank. For this reason, it is allowed for a sewage treatment plant to discharge straight to a ditch or watercourse. An STP will also require emptying, but not as regularly as a cesspit.
Septic Tank: should generally be emptied once a year. The frequency may vary depending on the tank’s capacity and usage.
Cesspit: requires more frequent emptying, depending on its capacity and usage. As it stores all wastewater without an outlet, the level should be monitored regularly.
Sewage Treatment Plant: should be serviced annually and emptied in accordance with the manufacturer’s recommendations and the servicing engineer’s advice.
The manufacturers’ guarantee gives the lifespan of 25 years
No, all will need emptying at some point.
If you’re installing a new septic tank in a domestic or commercial property, you will need planning permission from your local authority. If you’re simply replacing an old one, however, there’s no need to seek further permission.
Government’s General Binding Rules.
You can read more about planning permission for drainage systems on the official Planning Portal.
The installation of new sewage treatment plants and associated drainage. We also specialize in all forms of groundworks.
From single house applications to multi-user commercial sites, we undertake all aspects of the installation from system design, excavations, electrical installation through to final landscaping.
We offer a tailored annual service agreement to provide scheduled service visits and call-out cover in the event of a problem.
South East UK: Hampshire, Berkshire, Surrey, Sussex, Kent (South of the M25)
We have over 30 years’ experience in the drainage industry.
We are a relatively small, family run firm, and like to think we give a very personal service to our customers. Giving genuine advice without pressure to purchase.
Yes, all our installations are carried out to the very highest standards and fully comply with Building Control and Environment Agency requirements. All installations are completed using the government’s General Binding Rules https://www.gov.uk/government/publications/small-sewage-discharges-in-england-the-general-binding-rules/general-binding-rules-for-small-sewage-discharges-ssds-with-effect-from-2-october-2023
Certainly, we have installed a number of bespoke tanks which have had to be customized due to a lack of space or access issues.
All our tanks are installed to the correct manufacturers’ recommendations, surrounded in concrete with all the drainage laid to the correct fall for the site on a bed of 10mm shingle. An on-going service contract is offered with all new installations.
Call the office on 01903 815377 (or email on enquiries@boxallward.co.uk) and speak to our office staff who will be able to take your details. We can then arrange for Andrew Boxall to visit your site and discuss your specific requirements. After his visit a quote will be produced to provide a solution to your needs.
This is part of the annual service agreement. If the client does not have a service agreement we can attend as a one-off call-out for a fee. We work 5 days a week – Mon-Fri and commit to attend an emergency within 48 hours of the initial call.
