Emptying, servicing and surveys for septic tanks, cesspits and treatment plants in Stockbridge and the villages up and down the Test valley.
Stockbridge is a one-street town on the River Test, and the countryside around it is about as rural as Hampshire gets. In the villages, from the three Wallops and Broughton to Longstock, Chilbolton and the Sombornes, a large share of homes, farms and fishing lodges have their own drainage rather than a mains connection.
The Test is a chalk stream, famous for its clear water and its fishing, and much of the valley floor is water meadow. That combination is the reason private drainage gets so much attention here. A septic tank that leaks, or one that discharges where it shouldn’t, ends up in water that’s protected and closely watched.
We empty, service and survey systems around Stockbridge throughout the year. Our tankers and engineers are in Hampshire almost every day, and the phones are answered 24 hours a day if something goes wrong.
We empty septic tanks and cesspits at homes, farms and holiday lets in the villages around Stockbridge. Tankers range from 2,000 to 4,000 gallons, so we can usually match the vehicle to your lane. While we’re there we check the outlet and baffles and tell you if anything isn’t right.
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Treatment plants are common here, especially where old septic tanks have been replaced. Our engineers service them at least once a year, cleaning and checking the plant, testing the blower and pumps and leaving a written report.
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If you’re buying in the Test valley, or you’re not sure where your tank discharges, a survey gives you the answers. It shows what you have, its condition, and whether it meets the rules, so you know if an upgrade is coming.
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Properties on low ground near the river sometimes need a pump to lift waste to the tank or plant. When a pump, float or control panel fails, we find the fault and fix it, and our confined space teams can work safely in deeper chambers.
Learn moreLocal knowledge
The Test and its water meadows shape how private drainage works in this valley.
The valley floor is low and wet for much of the winter. A drainage field on low ground can struggle when the river is high, so it’s worth having the tank emptied before winter.
The River Test is a protected site. A septic tank discharging into the river or a ditch has to be upgraded under the General Binding Rules.
Test Valley Borough Council looks at nutrient impact when new homes are built. Ask early if you’re converting or building.
Local to you
From Stockbridge out to the villages of the Test valley and the downs either side, here’s where we work.
Stockbridge · town and nearby
Surrounding villages · where septic tanks and treatment plants are common
If you’re in the Test valley, call with your postcode and we’ll confirm.
Why Stockbridge customers use us
Whether it’s a cesspit at a farm near the Wallops or a treatment plant at a lodge by the river, here’s what you get.
We’ve been emptying tanks and servicing systems since long before most of the kit on the market existed.
Our engineers and most of our tanker drivers hold current confined space entry certificates, and the engineers carry the most common parts.
Tankers from 2,000 to 4,000 gallons, jet/vac combination units, CCTV survey kit and confined space teams for pump station wet wells.
A waste transfer note with every collection, and a written report after surveys and services.
Regular customers get a reminder when their next empty or service is due.
Emergency call-outs 24 hours a day, 365 days a year, with a real person answering the phone.
Checkatrade
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Scores as of September 2026
★★★★★Had a very good experience with Clear Masters. They provide an excellent, professional service, friendly and helpful, on time as per the agreed price
Richard G. Google review
★★★★★I have used this business for several years now and they have consistently provided outstanding service.. Every member of staff has been friendly, competent and professional. Very impressive.
★★★★★Came out within an hour on an emergency call out. Great service. Fast reliable reasonable prices. Highly Recommended
How it works
Simple and the same every time.
Step 1
Call us or book online and tell us what you have and when it was last emptied or serviced. If you’re not sure, we’ll help you work it out.
Step 2
We agree a date and send a tanker or service engineer. It helps if:
Step 3
You get a waste transfer note for anything we take away, and a written report after a survey or service. If it’s a regular job, we’ll remind you when the next one is due.
Free, no-obligation quote
Tell us about your tank or plant and we’ll come back with a price. If something’s overflowing, call us now instead.
Questions answered
What people around Stockbridge and the Test valley most often ask us.
If it discharges straight into the river, a ditch or a stream, yes. The General Binding Rules require those to be upgraded, usually with a treatment plant or a drainage field. You can read the rules on GOV.UK.
On low ground near the river, the water table rises in winter and the field can’t drain. Emptying the tank before the wet season helps. If it happens every year, a survey can show whether the field needs moving, extending or replacing.
Yes. We service plants at homes, holiday lets and lodges, and can arrange visits between guests if you tell us when the property is empty.
We find and inspect the tank, check its condition and how it’s working, trace where it discharges and tell you whether it meets the current rules. You get a written report you can use when buying, selling or planning work.
Usually, yes. Our tankers come in different sizes and carry long hoses. Tell us about access when you book and we’ll send the right vehicle.
Yes. Our crews are in Hampshire most days and we answer 24 hours a day. Call 03333 233566 and we’ll tell you when we can get to you.
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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