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Septic Tank & Treatment Plant Servicing

The general binding rules say a treatment system should be regularly maintained in line with the manufacturer's instructions, by someone competent. Regular septic tank servicing catches small faults before they become a failed drainage field or a pollution problem.

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  • Assessment before any recommendation
  • Written quote that says what's included
  • Building Regulations and permits explained
  • Ground put back as agreed
On this page
  1. What's checked
  2. How often
  3. New systems
  4. Cost
  5. Questions

What's checked

What a service covers

For a septic tank, a service means lifting the covers, checking the sludge and scum levels, looking at the inlet and outlet pipes and baffles, and checking the condition of the tank. Then we walk the drainage field for wet ground, smells or unusually lush grass that suggest it's struggling.

A sewage treatment plant has more to look after. The air blower or compressor, diffusers, pumps, alarms and any filters are checked and cleaned, sludge levels are measured, and the treated water leaving the plant is looked at. Anything that needs attention is written down, with what it means for you.

Septic tanksSludge and scum levels, baffles, inlet and outlet, tank condition and the drainage field.
Treatment plantsBlower, diffusers, pumps, alarms, filters and the quality of the treated water.
Pump stationsPumps, floats, alarms and the chamber, so effluent keeps moving.
RecordsA note of what was checked and found, which helps when you sell.

How often

How often a system needs servicing

Treatment plants are usually serviced at least once a year, and some manufacturers recommend every six months. A septic tank has no moving parts, so a yearly check alongside desludging is usually enough. Busy households, holiday lets and commercial sites may need more frequent visits.

Sludge must be removed at least once a year, or in line with the manufacturer's instructions, so servicing and emptying are often booked together. Septic tank emptying

New systems

Commissioning and planned maintenance

A new treatment plant needs commissioning so it starts treating properly, and then a regular service schedule. For landlords, holiday lets and farms with several properties, planned maintenance keeps every system on the same timetable and the records in one place. Farms and businesses

Cost

What affects the price

We don't publish standard prices, because two jobs rarely cost the same. These are the things that move the figure.

Type of systemSeptic tank, treatment plant, pump station or cesspool.
Make and modelManufacturers set the service checks and intervals.
Moving partsBlowers, pumps, alarms and filters add to what's checked.
ConditionA neglected system takes longer the first time.
AccessCovers that are buried, seized or far from the drive.
EmptyingWhether desludging is done on the same visit.

Who it's for

Septic Tank & Treatment Plant Servicing for homes and businesses

For homes

Farmhouses, cottages, barn conversions and new rural homes. We look at how many people the system serves, the ground and the access, then explain the options in plain English.

For farms and businesses

Holiday lets, farm cottages and rural businesses often need bigger or busier systems, and volume limits matter. Farms and businesses

Planning

Planning your project

Scope

What the system serves, what's there now, and what needs to change.

Access

Room for machinery or a tanker, gateways, slopes and soft ground.

Approvals

Building Regulations, any permit, and planning where it applies.

Aftercare

Emptying, servicing and the paperwork you'll need if you sell.

Not sure which service you need?

Tell us what you've noticed. Photos of the access covers or the area around the system help if you have them, but they're optional. We'll tell you what's worth looking at first.

Start an enquiry

Questions

Septic Tank & Treatment Plant Servicing questions

Does a septic tank need servicing?

A septic tank has no moving parts, but it still needs regular desludging and a check of the tank, pipes and drainage field. The general binding rules say systems should be maintained in line with the manufacturer's instructions.

How often should a sewage treatment plant be serviced?

Usually at least once a year, and some manufacturers recommend every six months. Check the manual for your model, or tell us the make and we'll advise.

Who can service a septic tank or treatment plant?

The guidance says anyone who carries out maintenance on your system must be competent. Keep a record of each service; it helps if you sell the property.

My treatment plant alarm is going off. What should I do?

Don't ignore it. It usually means a pump, blower or float has failed, or the plant is too full. Send us the make and model with your enquiry and choose "As soon as possible".

Want a clear answer for your property?

Tell us what's happening and roughly where you are. No need to know what type of system you have.

Request a site assessment

From the blog

Septic tank maintenance: a simple guideThe habits that keep a system working and help it last longer.How often should a septic tank be emptied?What the rules say, what affects it, and the signs it's overdue.Septic tank regulations explainedThe general binding rules in England, in plain English.Treatment plant servicing: what's involved and how oftenWhat a sewage treatment plant service covers, how often it's needed, and the signs it's overdue.Septic tank pumps: when you need a pumped systemWhen gravity isn't enough, how a pumped system works, and what it needs to keep running.Septic tank covers and lids: safety and replacementKeeping covers safe, accessible and strong enough for what passes over them.

Related services

Septic Tank ReplacementWhen a system has failed, is too old, or no longer meets the rules.Domestic Sewage Treatment PlantsHome treatment plants for upgrades and new builds.Septic Tank InstallationNew tanks with a correctly sized drainage field.Drainage FieldsNew and replacement drainage fields, designed from ground testing.Septic Tank & Drainage SurveysFor buyers, sellers and owners who need a clear answer.Septic Tank EmptyingEmptying and desludging for septic tanks, treatment plants and cesspools.Septic Tank RepairsBroken pipes, baffles, lids, pumps and blowers, fixed where a repair makes sense.CCTV Drain SurveysCamera surveys of the pipes between the house, the tank and the outlet.