Septic tanks, treatment plants and drains looked after for homes, farms and businesses in Bishop’s Waltham and the Meon valley villages.
Bishop’s Waltham is a small medieval town where the River Hamble begins, with farmland and villages all around it. The town is on mains drainage, but many homes in Upham, Durley, Curdridge, Droxford, Hambledon and the rest of the area are not. They depend on septic tanks, cesspits and treatment plants.
This is where the chalk meets the clay. North of the town, towards Upham, the ground is chalk downland; to the south it turns to heavier clay that drains slowly. In the Meon valley, the river is another chalk stream. Which side of the line you’re on makes a real difference to how well a soakaway or drainage field copes.
We look after private drainage, drains and grease traps around Bishop’s Waltham all year round. Our tankers and engineers are in Hampshire most days and we’re available 24 hours a day, 365 days a year.
We empty septic tanks and cesspits at homes and farms around Bishop’s Waltham, and check the tank and outlet while we’re there. On the clay to the south of the town, cesspits and tanks with tired drainage fields are common, and we can set up regular emptying so they never get close to overflowing.
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A treatment plant needs a yearly service to keep treating water properly. Our engineers check and clean the plant, test the blower and pumps, carry the most common parts, and repair it when something stops working.
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From older houses in the town’s historic streets to newer estates, we clear blocked drains with high-pressure jetting. If a drain keeps blocking, a CCTV survey shows the cause before you spend money on repairs.
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A septic tank survey tells you what system a property has, its condition and where it discharges. It’s worth having before you buy and before you decide whether an old tank needs replacing.
Learn moreLocal knowledge
Chalk to the north, clay to the south and two rivers starting nearby.
On the chalk, soakaways usually drain well. On the clay to the south, water soaks away slowly and drainage fields can struggle in winter.
The Hamble rises in the town and the Meon runs through nearby villages. A septic tank that discharges into either, or into a ditch, has to be upgraded.
Both rivers flow into the Solent, where nutrient levels are a concern. Councils here expect new homes to be nutrient neutral, which affects new treatment plants.
Local to you
From the town out to the Meon valley and the villages towards Wickham, here’s where we work around Bishop’s Waltham.
Bishop’s Waltham · town and nearby
Surrounding villages · where private drainage is common
If you’re around Bishop’s Waltham, call with your postcode and we’ll confirm.
Why Bishop’s Waltham customers use us
Whether it’s a cesspit on the clay near Durley or a treatment plant in the Meon valley, here’s what you can expect.
We’ve been emptying tanks and servicing systems since long before most of the kit on the market existed.
Tanks, treatment plants, pump stations, grease traps and drains, all handled by one team.
Our engineers and most of our tanker drivers hold current confined space entry certificates, and the engineers carry the most common parts.
A waste transfer note with every collection, and a written report after surveys and services.
Emergency call-outs 24 hours a day, 365 days a year, with a real person answering the phone.
Regular customers get a reminder when their next empty or service is due.
Checkatrade
From 134 reviews · Read them
From 63 reviews · Read them
Scores as of September 2026
★★★★★Our family have been using Clearmasters for years and are the only choice as far as we are concerned! All the staff are friendly, helpful and accommodating. Couldn’t recommend them highly enough!
Stu Google review
★★★★★I have used Clearmasters for years. They are always on time, polite and reliable whether your need them to empty your septic tank or undertake maintenance work. I wouldn’t use anyone else. Local and the best.
★★★★★Work carried out professionally as usual, the only company I'd recommend.
How it works
The same simple process for every job.
Step 1
Call us or book online and tell us what you need. If you don’t know what type of system you have, describe what you can see and we’ll help.
Step 2
We agree a date and send the right vehicle for the job. 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 what you need and we’ll give you a price. If something’s overflowing, call us now instead.
Questions answered
The questions people around Bishop’s Waltham ask us most often.
Around Bishop’s Waltham the ground can change from chalk to clay over a short distance. Chalk lets water through quickly; clay holds it. Two neighbouring systems can behave very differently because of what’s underneath them.
It depends on its size and how much water the household uses, but cesspits fill much faster than septic tanks, often every few weeks or months. We can work out a schedule and book regular collections.
Yes. We service and repair treatment plants at homes and farms throughout the Meon valley and around Bishop’s Waltham, and empty the sludge when it’s due.
Not any more. Under the General Binding Rules, a septic tank discharging to a ditch, stream or river must be upgraded. A survey will confirm where yours goes, and we can install a treatment plant if you need one.
Yes. We’ll set up regular emptying based on the size of your trap and how busy you are, and leave a waste transfer note each time.
Our tankers and engineers work in south Hampshire most days. Call 03333 233566 at any time and we’ll tell you when we can be there.
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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