Drains, interceptors, grease traps and pump stations looked after for homes, marinas, boatyards and businesses across the Gosport peninsula.
Gosport sits on a flat peninsula between Portsmouth Harbour and the Solent, with a long naval history, marinas and boatyards along the waterfront, and residential areas from Alverstoke to Lee-on-the-Solent. Nearly all of it is on mains drainage, so our work here is mainly clearing and surveying drains, and looking after interceptors, grease traps and pump stations.
Low, flat ground means drains run slowly and some properties rely on pumps to reach the sewer. Marinas, boatyards and workshops need interceptors to keep oil and fuel out of the drains, and those need regular emptying and records.
We’re SafeContractor, Achilles UVDB and RISQS approved, and our crews work in Hampshire most days. We answer the phone 24 hours a day, 365 days a year.
We clear blocked drains at homes, flats and businesses with high-pressure jetting, and survey them with CCTV when problems keep coming back. You get a written report with photos for your records, landlord or insurer.
Learn more
Boatyards, marinas, garages and workshops need oil interceptors to stop fuel and oil reaching the drains and the harbour. We empty and clean interceptors and gullies, and provide waste transfer notes for every load.
Learn more
Restaurants, cafés and takeaways need grease traps emptied regularly. We set a schedule to match how busy you are and leave a waste transfer note each time.
Learn more
On flat, low ground, many sites and some homes depend on pump stations. We service them, test the pumps, floats and alarms, and come out 24/7 if one fails.
Learn moreLocal knowledge
Flat ground, salt water and waterfront businesses.
With very little fall, drains are prone to silt and fat building up. Regular jetting prevents blockages on commercial sites.
Oil and fuel from waterfront sites must not reach the drains. Interceptors protect the harbour, but only if they’re emptied.
Low-lying areas near the shore can flood in storms. Clean gullies and working pumps help water clear faster.
Local to you
We cover the whole Gosport peninsula and the surrounding area.
Gosport · town and neighbourhoods
Surrounding areas · homes and businesses we cover
If you’re anywhere on the peninsula, call with your postcode and we’ll confirm.
Why Gosport customers use us
Whether it’s an interceptor at a boatyard or a blocked drain at home, here’s what you can expect.
SafeContractor, Achilles UVDB and RISQS approved, so we can get onto managed sites and meet your contractor checks.
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.
Emergency call-outs 24 hours a day, 365 days a year, with a real person answering the phone.
Tanks, treatment plants, pump stations, grease traps and drains, all handled by one team.
We’ve been emptying tanks and servicing systems since long before most of the kit on the market existed.
Checkatrade
From 134 reviews · Read them
From 63 reviews · Read them
Scores as of September 2026
★★★★★Clearmasters have been emptying and servicing our treatment plant for the last 7 years and their service and quality of work is of a high standard. I would highly recommend them.
Angus C. Google review
★★★★★Efficient, courteous, customer-facing. Would not hesitate to recommend to others.
★★★★★I've used Clearmasters for at least 10 years and always find them reliable, helpful, knowledgable and great at what is a really unpleasant job! I won't use anyone else.
How it works
The same simple process for every job.
Step 1
Call us or book online and tell us what you need. For marinas and commercial sites, let us know about access and site rules.
Step 2
We send the right vehicle and paperwork. 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 come back with a price. If something’s flooding or overflowing, call us now.
Questions answered
What homeowners, marinas and businesses in Gosport ask us most.
If oil or fuel could reach the surface water drains from your site, you should have one, and it needs regular inspection and emptying. We can inspect yours and suggest a schedule.
It depends on its size and how much oil and silt it collects. Many sites have them inspected every six months and emptied when needed. Keep the waste transfer notes for your records.
The peninsula is very flat, so drains have little fall and silt settles easily. Jetting clears them; a CCTV survey shows if there’s damage too.
Yes. We cover the whole peninsula and the surrounding area.
Yes, for homes, estates and commercial sites, and we respond 24/7 if one fails.
Yes. We answer the phone 24 hours a day. Call 03333 233566 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.
Keep the site, forms and online booking working, and protect them from spam.
Google Analytics: counts visits and shows us which pages are useful, so we can improve the site.
Meta (Facebook) pixel: measures our Facebook adverts and shows our adverts to people who've visited our site.
CLEARMASTERS