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Treatment Plant Servicing & Repairs in Godalming

Servicing, repairs and desludging for sewage treatment plants at homes, conversions and farms in the river valleys around Godalming.

Godalming sits where the River Ock meets the River Wey, and a lot of the countryside around it drains towards one or the other. Many treatment plants in this area send their cleaned water to a stream, ditch or one of the rivers rather than into the ground.

You’ll find plants at farm buildings turned into homes around Shackleford and Peper Harow, at larger houses rebuilt on old plots near Busbridge and Hambledon, and at places where an old septic tank had to be replaced to meet the rules. A plant is a working machine, with a blower, diffusers and often a pump, and it needs looking after every year. In some cases the plant came with the house and the new owners have no record of when it was last serviced. That’s worth sorting out soon after you move in.

Our engineers service and repair treatment plants around Godalming, clean and test every part and leave a written report. We can desludge the plant from our own tanker on the same visit.

What's included

What a service covers

Our engineers go through the whole plant, not just what you can see from the lid.

  • Control panel

    We check the panel, its settings and any warning lights, and make sure it’s safe.

  • Lid and access

    The lid, seals and fixings are checked so the plant stays safe and watertight.

  • High-level alarm

    The alarm is tested so it will warn you if the plant starts to back up.

  • Baffles and pipework

    We check the baffles, inlet and outlet are clear and undamaged, so waste moves through the chambers properly.

  • The final effluent

    We look at what’s leaving the plant, which is a quick guide to whether it’s treating properly.

  • Pumps and floats

    Any pumps are run and tested, and floats are checked to make sure they move freely.

Repairs and desludging

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A Clearmasters service van at a customer’s property

Discharging to the Wey and the Ock

The Ock rises near Witley and joins the Wey at the west end of Godalming, while the Wey itself passes Elstead and Eashing on its way into town. If your plant discharges to either river, or to a brook that feeds them, the General Binding Rules apply. The plant has to be serviced to the maker’s schedule and must not cause pollution.

A plant that has stopped aerating sends cloudy, smelly water into the stream. That’s often the first thing a neighbour notices, so a yearly service saves awkward conversations as well as fines.

Learn more
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A Clearmasters service van

Staying within the rules

Treatment plants that discharge to the ground or to a watercourse must be maintained in line with the manufacturer’s instructions under the General Binding Rules, with the sludge removed regularly.

Your service record shows the plant has been looked after, which buyers and their solicitors often ask to see.

Learn more

Local to you

Treatment plant servicing around Godalming

We service treatment plants along the Wey and Ock valleys and on the hills around Godalming, including Elstead, Eashing, Peper Harow, Shackleford, Milford, Witley, Wormley, Enton Green, Hambledon and Hascombe. Homes on the edge of Thursley Common and around Brook are covered as well. See the full Godalming area list.

Other services in Godalming

We look after the whole system, not just one part of it.

Related services

Call 03333 233566

What our customers say

9.84/10

Checkatrade

From 134 reviews · Read them
4.9/5

Google

From 63 reviews · Read them

Scores as of October 2026

★★★★★

Clearmasters have emptied our Septic Tank for many years. It is not an easy placed tank to get to but the chaps manage perfectly. I find them very efficient, friendly and polite. Thank you Valerie Wise

Valerie W. Google review
★★★★★

So glad we found them. The team was professional, courteous and helpful. They came the next day and pricing is way more competitive than a national chain. Will be using them again in a year's time to service the pump. Thanks again!

Drake I. Google review
Read all our reviews

Free, no-obligation quote

Book a treatment plant service in Godalming

Let us know your plant’s make and any warning lights or smells, and we’ll quote and book an engineer.

  • Free quotes for servicing and repairs
  • Engineers carry the most common parts
  • Emergency call-outs 24/7
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Questions answered

Treatment plant questions

Our plant near Elstead discharges to the River Wey. What do we need to do?

Keep it serviced as the maker recommends, have it emptied by a registered waste carrier, and fix faults quickly. Those are conditions of the General Binding Rules for any plant discharging to a river. Keep your service reports too, as a buyer’s solicitor will ask for them when you sell.

My plant smells. What does that mean?

A healthy plant shouldn’t smell much. A strong smell often means the blower has stopped and the bacteria have died off, or the sludge is overdue for removal. Call us and we’ll check it.

What’s the difference between servicing and emptying?

A service checks the mechanical and electrical parts: blower, pumps, floats, alarm and panel. Emptying, or desludging, removes the sludge that builds up. Most plants need both, and we can do them on the same visit.

We’re converting a barn near Shackleford. Will we need a treatment plant?

If there’s no public sewer within reach, almost certainly. A septic tank alone can’t discharge to a watercourse, so a treatment plant is the usual choice for new homes in the countryside around Godalming. We install plants and can then look after them with a yearly service.

Do you service my make of plant?

We service and repair the common makes, including Klargester, Conder, Marsh, Graf, Tricel and WPL Diamond. If you’re not sure what you have, send a photo of the lid or panel when you get in touch.

Is servicing a legal requirement?

If your plant discharges to the ground or a watercourse, the General Binding Rules say it must be maintained by someone competent in line with the manufacturer’s instructions. Regular servicing is the simplest way to show that.

Got a different question? Call 03333 233566 or send us a message.

Fully accredited & compliant

We're independently vetted and certified so you can trust who you're letting onto your site.

SafeContractor

Health & safety pre-qualification accreditation, verifying our processes meet recognised safety standards.

RISQS

Railway Industry Supplier Qualification Scheme — approved to work safely within the rail industry supply chain.

Achilles UVDB

Utilities Vetting Database membership, confirming we meet the utilities sector's supply chain standards.

Trading Standards Approved

Vetted and approved under the local authority's trusted trader scheme for honesty and fair dealing.

NADC Member

Members of the National Association of Drainage Contractors, the UK trade body for the drainage industry.

Registered Waste Carrier

Registered with the Environment Agency, so your waste is handled and disposed of fully within the law.

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