Servicing, repairs and desludging for domestic and commercial treatment plants across Horsham and its villages, covering all the main makes.
Sewage treatment plants are common around Horsham, particularly on newer rural homes, barn conversions and small developments that couldn't be connected to the mains. Unlike a septic tank, a treatment plant is a working machine. A blower pumps air into it so bacteria can break the waste down, and it has pumps, floats and a control panel that all need looking after.
Under the Environment Agency's General Binding Rules, the owner has to keep the plant maintained in line with the manufacturer’s instructions and have the sludge removed regularly. A regular service is the simplest way to stay on the right side of those rules, and it catches worn parts before they fail.
We service, repair and empty plants for homeowners, landlords and businesses across the Horsham district, usually in a single visit.
What's included
Our engineers work through the whole plant, not just the parts you can see from the lid.
We check the blower is running properly and that air is reaching the diffusers, since this is what keeps the plant treating.
Any pumps are tested, floats are checked for free movement, and the high-level alarm is tested.
We check the panel, settings and any warning messages, and make sure it's safe and working as it should.
We measure the sludge and arrange desludging when it's needed, often on the same visit.
We look at what's leaving the plant, as a quick sign of whether it's treating properly.
You get a record of the service and our advice, which is useful for your own files or when you sell the property.
The parts that fail most often are the air blower, the control panel, pumps and alarms. Our engineers carry common spares on their vans, so where we can, we fit a replacement there and then instead of coming back another day.
If your plant has stopped working, the alarm is sounding or it has started to smell, give us a call and we'll get an engineer out to find the fault.
Learn more
Every treatment plant builds up sludge, and it needs removing before it goes beyond what the plant can hold, usually at least once a year. Leave it too long and solids can carry over into the final chamber and out into your drainage field or watercourse.
We can desludge on the same visit as your service, using our own tankers.
Learn moreLocal to you
We service and repair treatment plants at homes, farms and rural businesses throughout the area. Our engineers cover Rusper, Warnham, Slinfold, Rudgwick, Cowfold, Lower Beeding, Henfield, Ashington, Storrington and the farms and barn conversions in between. See the full Horsham area list.
We look after the whole system, not just one part of it.
Checkatrade
From 134 reviews · Read them
From 63 reviews · Read them
Scores as of September 2026
★★★★★Clearmasters have been servicing and emptying my Klargester for many years now. They are a wonderful bunch. Always professional, friendly, helpful, and reliable. Have never had a problem with them and would definitely recommend them.
Checkatrade review Klargester servicing · RH12
★★★★★First of all the engineer attended site exactly on time and the slot had been within a couple of days of phoning. The required work was completed and the motor realigned to prevent future wear. The engineer also provided advice and a written report.
Free, no-obligation quote
Tell us the make of your plant if you know it, and we'll come back with a price. If it has stopped working or the alarm is going, call us.
Questions answered
Most manufacturers recommend a service at least once a year, and some plants benefit from more frequent visits. Your plant's manual will say what its maker recommends, and we can set up a schedule to match.
Servicing is about keeping the plant working: checking the blower, pumps, floats, alarm and control panel. Emptying, or desludging, removes the sludge that builds up inside. Your plant needs both, and we can do them in the same visit.
If your plant discharges to a drainage field or a watercourse, the General Binding Rules say it must be maintained by someone competent in line with the manufacturer's instructions, and the sludge removed before it goes beyond the plant's capacity. Keeping service records shows you've done this.
We service all the main makes, including Klargester, Conder, Marsh, Graf and Tricell. If you don't know which you have, tell us what's written on the lid or control panel.
Reduce your water use and call us on 03333 233566. The alarm usually means the blower or a pump has stopped, or the level inside is too high. Don't open the control panel or try to reset it repeatedly; let an engineer find the cause.
Often, yes. Our engineers carry the most common parts, such as blowers, so many repairs are finished on the first visit. If a less common part is needed, we'll tell you how long it will take to get.
Got a different question? Call 03333 233566 or send us a message.
We're independently vetted and certified so you can trust who you're letting onto your site.
Health & safety pre-qualification accreditation, verifying our processes meet recognised safety standards.
Railway Industry Supplier Qualification Scheme — approved to work safely within the rail industry supply chain.
Utilities Vetting Database membership, confirming we meet the utilities sector's supply chain standards.
Vetted and approved under the local authority's trusted trader scheme for honesty and fair dealing.
Members of the National Association of Drainage Contractors, the UK trade body for the drainage industry.
Registered with the Environment Agency, so your waste is handled and disposed of fully within the law.
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