CLEARMASTERS
Blocked drains
Blocked toilet, sink or outside drain? We clear it with high-pressure jetting, tell you what caused it, and let you know if there’s anything you can do to stop it happening again.
Learn morePortchester sits at the top of Portsmouth Harbour, best known for its castle built inside a Roman fort, and surrounded by streets of family homes built over the last century. It’s on mains drainage, so the work we do here is mostly for homeowners: clearing blocked drains, surveying pipes that keep giving trouble, and checking drains for people buying a house.
Many homes here are now old enough for their drains to show their age. Clay pipes crack and let roots in, joints shift, and pitch fibre pipes from the 1960s and 70s can deform. Close to the harbour the ground is low and flat, so drains run slowly and silt up.
We also look after shops, pubs and small businesses along the main roads. Our crews are in Hampshire most days and we answer the phone 24 hours a day, 365 days a year.
Our Portchester drainage services
View all services
Blocked Drains & CCTV Surveys
Learn more
Septic Tank Surveys
Learn more
Gullies & Interceptors
Learn more
Grease Traps & Commercial Waste
Learn more
Flood & Groundwater Removal
Learn more
Pump Station Servicing
Learn morePortchester
& the harbour
& the harbour
24/7
call-outs
call-outs
Homes &
local businesses
local businesses
Written
reports
reports
Own vans
& tankers
& tankers
What we do for Portchester customers
CCTV drain surveys
If a drain keeps blocking or smells, or you’re buying a house, a CCTV survey shows the condition of the pipes, including cracks, roots, deformed pitch fibre and displaced joints. You get a written report with photos.
Learn more
Grease traps for pubs and takeaways
Pubs, cafés and takeaways need their grease traps emptied regularly to stop fat blocking the drains. We set up a schedule and leave a waste transfer note every visit.
Learn more
Gullies and surface water
On low, flat ground, gullies full of silt mean puddles and flooding. We clean gullies at shops, car parks and private roads, and can pump away standing water after storms.
Learn moreLocal knowledge
Drainage in Portchester: what to know
What we see most often in Portchester’s drains.
Ageing pipes
Many homes here have drains that are 50 to 100 years old. Roots and cracked joints are common causes of repeat blockages.
Older pipe materials
Depending on when your home was built, the drains may be clay, pitch fibre or early plastic, and each fails in its own way. A survey tells you which you have.
Low by the harbour
Streets close to the water are low and flat, so drains run slowly. Keeping fat and wipes out of the drain makes a big difference.
Local to you
Areas we cover in and around Portchester
We cover Portchester and the surrounding areas around the top of Portsmouth Harbour.
Portchester · and neighbourhoods
- Portchester
- Wicor
- Seafield
- Downend
- Wallington
Surrounding areas · homes and businesses we cover
- Paulsgrove
- Wymering
- Cosham
- Fareham
- Hilsea
- Boarhunt
- Southwick
- Widley
- Drayton
- Gosport
- Portsmouth
- Wickham
Not sure if we cover you?
If you’re in or around Portchester, call with your postcode and we’ll confirm.
Nearby areas
Why Portchester customers use us
Clear answers about your drains
Whether it’s a blocked drain at home or a survey before you buy, here’s what you can expect.
-
Day and night, all year
Emergency call-outs 24 hours a day, 365 days a year, with a real person answering the phone.
-
34 years in drainage
We’ve been emptying tanks and servicing systems since long before most of the kit on the market existed.
-
Paperwork done properly
A waste transfer note with every collection, and a written report after surveys and services.
-
The right kit for the job
Tankers from 2,000 to 4,000 gallons, jet/vac combination units, CCTV survey kit and confined space teams for pump station wet wells.
-
One call for everything
Tanks, treatment plants, pump stations, grease traps and drains, all handled by one team.
-
Trained engineers
Our engineers and most of our tanker drivers hold current confined space entry certificates, and the engineers carry the most common parts.
What our customers say
9.84/10
Checkatrade
From 134 reviews · Read them
4.9/5
From 63 reviews · Read them
Scores as of September 2026
★★★★★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
★★★★★We've been using Clearmasters for several years now and they've been great. We're in a tricky area to get to but they always make a plan without complaint. Great team! Highly Recommended.
★★★★★Had a very good experience with Clear Masters. They provide an excellent, professional service, friendly and helpful, on time as per the agreed price
How it works
What happens when you book
The same simple process for every job.
-
Step 1
Tell us what you’ve got
Call us or book online and tell us what’s happening, or what you need surveyed and by when.
-
Step 2
We come out and do the job
We send the right van or tanker. It helps if:
- manhole covers are clear and easy to get to
- there’s somewhere nearby for our van to park
- you tell us what you’ve already tried, like drain rods or chemicals
-
Step 3
Paperwork and the next visit
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
Get a quote for your Portchester property
Tell us what you need and we’ll come back with a price. If something’s overflowing, call us now.
- Free quotes for drains and surveys
- CCTV surveys with written reports and photos
- Grease traps and gullies for local businesses
Urgent?
03333 233566
Questions answered
Portchester drainage FAQs
What homeowners and businesses in Portchester ask us most.
What usually causes blocked drains in Portchester?
Wipes, fat and food waste are the most common causes, followed by tree roots getting into older clay pipes. On flat ground near the harbour, silt build-up also plays a part.
I’m buying a house in Portchester. Is a drain survey worth it?
For a home that’s 50 years old or more, often yes. A standard building survey doesn’t look inside the pipes. Ours does, and if we find a cracked or sagging run you’ll know before you commit, not after.
Our post-war house has drains that keep blocking. Could it be the pipe itself?
Possibly. Some homes of that era were built with pitch fibre pipes, which can blister and flatten as they age, catching paper and wipes. A camera survey will show the shape of the pipe and whether it needs relining.
Who is responsible for a shared drain?
Drains serving more than one property are usually the water company’s responsibility. We can find the blockage and tell you which part it’s in.
Do you empty grease traps for local businesses?
Yes, for pubs, cafés and takeaways. We set up a schedule and leave a waste transfer note every time.
Can you come out today?
Our crews work in Hampshire most days. 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.
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.