Drain unblocking in Hampshire

A blocked drain in Hampshire needs sorting quickly. Whether it's a kitchen sink refusing to empty in Southampton, a toilet backing up in Portsmouth, or an outside drain flooding your garden in Winchester, OneFlow Drainage provides rapid drain unblocking services across the county.

We're the drainage specialists trusted by homeowners and businesses from Basingstoke to the New Forest, Aldershot to the Solent coast. Our engineers cover every corner of Hampshire, which means we can usually reach you within 60 minutes of your call.

No callout fees. No hidden charges. Just honest, professional drain unblocking when you need it most.

Why choose OneFlow for drain unblocking in Hampshire?

Hampshire property owners choose us because we understand the unique drainage challenges across this large and varied county. From the port cities of Southampton and Portsmouth to the historic streets of Winchester, from the business parks of Basingstoke to the villages of the New Forest, we've seen and unblocked it all.

Local knowledge that matters

Our engineers know Hampshire's drainage infrastructure inside out. We understand the common issues affecting different areas, whether that's the Victorian sewers beneath Southampton's city centre, the naval dockyard drainage in Portsmouth, or the rural systems serving villages across the Test Valley.

This local expertise means faster diagnosis and more effective solutions. We're not guessing what's causing your blockage. We know the typical culprits for properties in your area and come prepared with the right equipment to deal with them.

Genuine 24/7 emergency response

Blocked drains don't wait for convenient times. That's why we operate a genuine 24/7 emergency service across Hampshire. Whether your drain blocks at 3pm on a Tuesday or 3am on Christmas morning, we'll have an engineer on the way.

Our response times across Hampshire:

No callout fees, ever

We don't believe in charging you just for turning up. Our pricing is straightforward: you pay for the work we do, not for the privilege of having us knock on your door. This applies whether you call us at midday or midnight, weekday or weekend.

Areas we cover in Hampshire

OneFlow Drainage provides drain unblocking services across the entire county of Hampshire. Our coverage includes both cities and all eleven districts:

Southampton

Hampshire's largest city and one of the UK's major ports, Southampton keeps our engineers busy year-round. We regularly attend properties across the city centre, Shirley, Portswood, Bitterne, Woolston, and the surrounding suburbs.

Southampton's maritime heritage means varied drainage infrastructure, from Victorian systems in the older parts of the city to modern developments around Ocean Village and the waterfront. The city's busy hospitality sector also creates particular drainage challenges.

Portsmouth

The island city of Portsmouth, home of the Royal Navy, presents unique drainage challenges. We cover the entire city including Southsea, Fratton, Copnor, Hilsea, and the historic dockyard area.

Portsmouth's island geography means drainage systems that have been developed and modified over centuries to cope with the constraints of limited land. High population density also puts pressure on drainage infrastructure.

Winchester

Hampshire's historic county town and England's ancient capital, Winchester combines medieval heritage with modern living. We attend properties across the city centre, Stanmore, Badger Farm, Weeke, and the surrounding villages.

The cathedral city's rich history means complex drainage beneath the historic streets, while the surrounding area includes properties of every age from medieval to brand new.

Basingstoke and North Hampshire

Basingstoke has grown from a market town into a major business centre, and we cover the entire borough including Basingstoke town, Tadley, Whitchurch, and Kingsclere.

The rapid expansion of Basingstoke since the 1960s means a mix of older drainage in the town centre and newer systems serving the extensive modern developments.

South Hampshire Coast

The coastal conurbation stretching from Southampton to Portsmouth includes several towns we serve:

Eastleigh - Part of the Hamble Valley, Eastleigh combines residential areas with its railway heritage.

Fareham - Sitting between Southampton and Portsmouth, Fareham serves as a hub for the surrounding area.

Gosport - Across the harbour from Portsmouth, Gosport has its own distinct character and drainage challenges.

Havant and Waterlooville - On the eastern edge of the conurbation, these towns connect Hampshire to West Sussex.

Test Valley

The beautiful Test Valley, famous for its chalk streams and fly fishing, includes:

Andover - A historic market town that's grown significantly in recent decades.

Romsey - A charming market town with medieval abbey and historic buildings.

Stockbridge - A picturesque village known for its antique shops and fishing.

New Forest

The New Forest National Park and surrounding area presents unique challenges, with many properties on private drainage systems. We cover Lymington, New Milton, Ringwood, Fordingbridge, and the forest villages.

East Hampshire

From Petersfield and Alton to the villages of the South Downs, East Hampshire combines market towns with rural countryside. We also cover the military towns of Aldershot and Farnborough in the northeast.

Common drain blockages in Hampshire

Understanding what causes drain blockages helps you prevent them. Here are the most common issues we deal with across Hampshire:

Fat, oil, and grease blockages

The number one cause of kitchen drain blockages in Hampshire homes. When fat goes down your plughole, it might be liquid, but it solidifies as it cools in your pipes. Over time, this builds up into solid masses that completely block your drains.

Hampshire's busy hospitality industry, from Southampton's restaurants to Portsmouth's seafood spots, contributes to the problem. Commercial fat deposits in the public sewer network can cause blockages that back up into private drainage systems.

Prevention tip: Never pour cooking fat down the drain. Let it cool and solidify, then scrape it into your food waste bin.

Wet wipes and sanitary products

Despite what the packaging says, most wet wipes don't break down properly in drainage systems. They catch on rough patches inside pipes, accumulate with other debris, and create stubborn blockages that are difficult to shift.

We remove tonnes of wet wipes from Hampshire drains every year. Even products labelled "flushable" can cause problems, particularly in older drainage systems.

Prevention tip: Only flush the three Ps: pee, poo, and paper. Everything else goes in the bin.

Tree root ingress

Hampshire is a well-treed county, from the ancient woodlands of the New Forest to the mature gardens of Winchester's suburbs. Those trees need water, and when their roots detect moisture escaping from drain joints, they grow towards it. Over time, they can penetrate drainage pipes, causing blockages and structural damage.

This is particularly common in established residential areas, the New Forest villages, and anywhere with mature trees near drainage runs.

Prevention tip: If you have large trees near your property, consider a CCTV drain survey every few years to catch root intrusion early.

Coastal and groundwater issues

Properties along Hampshire's Solent coast face specific drainage challenges. High water tables, tidal influences, and sandy soils can all affect drainage performance. Saltwater intrusion can also accelerate corrosion in older metal pipes.

Collapsed or damaged pipes

Hampshire has properties ranging from brand new to several centuries old. Older properties often have clay or cast iron drainage pipes that deteriorate over time. Ground movement, tree roots, heavy vehicle traffic, and simple age can cause pipes to crack, collapse, or become misaligned.

The county's varied geology, from chalk downs to clay vales to coastal gravels, creates different ground conditions that affect drainage systems in different ways.

When a pipe collapses, debris accumulates at the collapse point, creating a blockage. The solution isn't just clearing the blockage but repairing or replacing the damaged section.

Foreign objects

Children's toys, mobile phones, jewellery, excessive toilet paper, and countless other items end up in drains. Sometimes it's accidental, sometimes it's curiosity (parents of toddlers, you know what we mean), and sometimes we never do find out how a full-size action figure got into an outside drain.

Whatever's causing your blockage, we have the equipment and expertise to remove it and get your drains flowing freely again.

Our drain unblocking methods

Different blockages require different approaches. We arrive equipped to deal with whatever we find:

High-pressure water jetting

Our primary tool for most blockages. High-pressure water jetting uses specialised nozzles to blast water at pressures up to 4,000 PSI through your drains. This breaks up blockages, scours the pipe walls clean, and flushes debris through to the main sewer.

Jetting is highly effective against fat and grease buildups, accumulated debris, and light root intrusion. It's also the best way to clean drains preventatively, removing buildup before it becomes a full blockage.

Mechanical drain cleaning

For blockages that won't shift with water alone, we use mechanical cleaning equipment. Rotating cutting heads can break through solid blockages, cut through root masses, and clear compacted debris.

We match the cutting head to the pipe size and blockage type, ensuring effective cleaning without damaging your drainage system.

CCTV drain surveys

When we need to see exactly what's happening inside your drains, we deploy our CCTV survey equipment. Waterproof cameras travel through your drainage system, sending back real-time footage that shows us the blockage location, its cause, and the overall condition of your pipes.

CCTV surveys are essential for diagnosing complex blockages, locating collapsed pipes, and planning repair work. We provide you with the footage and a detailed report of our findings.

Manual rodding

Sometimes the traditional approach is the best one. Manual drain rods are effective for clearing straightforward blockages in accessible drain runs. They're quick to deploy and often all that's needed for simple blockages close to access points.

Drain unblocking for Hampshire businesses

Commercial drain blockages can disrupt your operations, drive away customers, and create health and safety issues. We provide rapid commercial drain unblocking services to businesses across Hampshire.

Maritime and port facilities

Hampshire's ports handle millions of tonnes of cargo and thousands of cruise passengers annually. We work with businesses across Southampton's docks, Portsmouth's commercial port, and the marinas along the Solent to keep drainage systems functioning.

Hotels and hospitality

Hampshire's tourism industry draws visitors to the New Forest, the historic cities, and the coast. Hotels, guest houses, and holiday accommodation rely on functioning drainage, and a blockage during peak season can be disastrous.

From Southampton's city centre hotels to New Forest B&Bs, we provide rapid response to keep hospitality businesses running smoothly.

Restaurants and food service

Hampshire's food scene ranges from waterfront seafood restaurants to country gastropubs. Kitchen drains face heavy demands and are prone to fat and grease blockages.

We keep commercial kitchens draining properly, with both emergency callouts and scheduled maintenance to prevent problems before they happen.

Retail and commercial premises

Blocked toilets in retail premises create customer complaints and can force you to close facilities. We respond quickly to commercial blockages across Hampshire's shopping centres (including West Quay and Gunwharf Quays), high streets, and business parks.

Military and defence

Hampshire's strong military presence includes numerous MOD sites. We're experienced with working on defence establishments and understand the specific requirements involved.

Property management

If you manage multiple properties across Hampshire, you need a reliable drainage contractor you can call whenever tenants report problems. We work with property managers and letting agents across the county, providing consistent service whether the call is for a flat in Portsmouth or a cottage in the New Forest.

Emergency drain unblocking in Hampshire

Some blockages can't wait until morning. Sewage backing up through your toilet, drains overflowing into your garden, or water flooding your kitchen floor all require immediate attention.

Our 24/7 emergency service means you're never left waiting with a drainage crisis. Call us any time, day or night, and we'll dispatch an engineer immediately.

What counts as a drainage emergency?

You should call our emergency line if you're experiencing:

• Sewage backing up into your property
• Drains overflowing and flooding outdoor areas
• Complete blockage of your only toilet
• Foul smells from drains inside your property
• Multiple fixtures affected (suggesting a main drain blockage)
• Any drainage issue creating a health hazard

What to do while you wait

If you've called us for an emergency and you're waiting for our engineer to arrive:

1. Stop using water - Don't flush toilets, run taps, or use appliances that drain water. Every bit of water you add makes the problem worse.
2. Protect your property - If water is escaping, move valuable items out of the way. Put down towels or use a wet vacuum if you have one.
3. Ventilate the area - If there are foul smells, open windows and doors to improve ventilation. Avoid spending extended time in affected areas.
4. Don't try chemical drain cleaners - These are rarely effective on serious blockages and can be dangerous for our engineers to work around.
5. Locate your outside drain - If you can safely identify and access your outside drain, this helps our engineer get started faster when they arrive.

Drain unblocking prices in Hampshire

We believe in transparent, honest pricing. Here's what you can expect to pay for drain unblocking services in Hampshire:

Standard drain unblocking

For most household blockages that can be cleared with jetting or rodding:

• Standard hours (8am-6pm, Mon-Sat): From £95
• Evening and Sunday: From £125
• Bank holidays: From £150

These prices cover arrival, diagnosis, and clearance of a standard blockage. If we find a more complex issue (like a collapsed pipe or extensive root intrusion), we'll explain what's needed and provide a clear quote before proceeding with any additional work.

What's included

• No callout fee
• Diagnosis of the blockage
• Clearing the blockage (jetting, rodding, or mechanical cleaning as required)
• Basic CCTV check to confirm the blockage is cleared
• Advice on preventing future blockages
• 30-day guarantee on our work

What might cost extra

• Extensive CCTV surveys (if you need a full drainage survey with report)
• Repair work (if we find damaged or collapsed pipes)
• Multiple blockages in separate drainage runs
• Exceptionally difficult access (though we'll discuss this before starting work)

We always provide clear pricing before we start any work. If we discover something unexpected, we'll explain the situation and give you options before proceeding.

Preventing drain blockages

The best blockage is one that never happens. Here's how to keep your Hampshire property's drains flowing freely:

In the kitchen

• Never pour fat or oil down the drain - Let it cool and dispose of it in your food waste bin
• Scrape plates thoroughly - Food debris should go in the bin, not down the sink
• Use sink strainers - Catch food particles before they enter your drains
• Run hot water after washing up - This helps flush grease through the system
• Clean your waste disposal regularly - If you have one, keep it clean and avoid overloading it

In the bathroom

• Only flush the three Ps - Pee, poo, and (toilet) paper. Nothing else.
• Use drain covers - Catch hair before it enters your drains
• Clean pop-up stoppers regularly - Hair and soap scum accumulate on these
• Avoid excessive bath products - Some can contribute to buildup in pipes

Outside

• Keep drain covers clear - Remove leaves, debris, and any obstructions
• Don't plant trees too close to drains - Roots can travel considerable distances to find water
• Know where your drains are - Don't build over them or block access
• Consider periodic maintenance - Annual jetting can prevent buildup becoming blockages

For coastal properties

• Monitor for corrosion - Salt air and high water tables can accelerate pipe deterioration
• Check after storms - Heavy weather can affect coastal drainage
• Consider regular inspections - Catch problems before they become serious

CCTV drain surveys in Hampshire

Sometimes you need to see what's happening inside your drains. Our CCTV drain survey service provides exactly that, using specialist cameras to inspect your drainage system from the inside.

When you might need a CCTV survey

• Buying a property - A pre-purchase drain survey can reveal problems before they become yours
• Recurring blockages - If you keep getting blocked, there's usually an underlying reason
• Planning extensions - You need to know where drains run before building over them
• After a blockage - To check for damage and confirm the drain is fully clear
• Insurance claims - Evidence of drain condition for insurance purposes
• Selling a property - Demonstrate good drainage condition to buyers

What you get

Our CCTV surveys include:

• Full inspection of accessible drainage runs
• Real-time footage reviewed with you on-site
• Written report detailing findings
• Recommendations for any repairs needed
• Digital copy of the footage for your records

Survey pricing

• Basic post-clearance check: Included with unblocking work
• Homebuyer survey: From £195
• Full property survey with report: From £245
• Commercial surveys: Priced based on system size

Drain repairs in Hampshire

When clearing a blockage isn't enough, we provide full drain repair services across Hampshire. Our repair capabilities include:

Patch lining

For localised damage like cracks, small holes, or joint failures, patch lining provides a repair without excavation. We install a resin-impregnated patch that bonds to the inside of the pipe, sealing the damage and restoring structural integrity.

Drain relining

When a longer section of pipe is damaged, drain relining (also called cured-in-place pipe or CIPP) creates a new pipe within the old one. A flexible liner saturated with resin is pulled through the damaged pipe, inflated against the pipe walls, and cured in place. The result is a seamless, jointless new pipe without the need for excavation.

Excavation and replacement

Some damage requires traditional excavation and pipe replacement. If a pipe has completely collapsed, been severely displaced, or is beyond repair, we'll excavate, remove the damaged section, and install new pipework.

We always explore no-dig options first, but when excavation is necessary, we do it properly. We handle everything from small domestic repairs to major drain reconstruction projects.

Why Hampshire properties develop drainage problems

Understanding why drains block helps you prevent problems. Here's what makes Hampshire properties susceptible to drainage issues:

Age and variety of housing stock

Hampshire's housing ranges from medieval cottages in Winchester to brand-new developments across the county. This means drainage systems of every age and type:

• Historic properties in Winchester, Romsey, and the market towns often have drainage modified over centuries.
• Victorian and Edwardian properties, common in Southampton and Portsmouth, often have clay pipes with lime mortar joints that deteriorate over time.
• Post-war expansion in places like Basingstoke means large areas with similar-aged drainage now reaching the end of its design life.
• Modern developments typically have robust uPVC systems, but poor installation can still cause problems.

Geological factors

Hampshire's geology varies significantly:

• Chalk downs in the north and east create hard water that can cause mineral buildup
• Clay vales can cause ground movement affecting pipe alignment
• Coastal gravels and sands along the Solent can shift and settle
• New Forest heathland has its own specific ground conditions

Coastal influences

Properties along Hampshire's extensive coastline face additional challenges:

• High water tables affecting drainage capacity
• Tidal influences on outfall systems
• Salt air accelerating corrosion
• Storm surge risks

Population density

The South Hampshire conurbation is one of the most densely populated areas outside London. This puts significant pressure on drainage infrastructure, particularly in older areas where systems weren't designed for current population levels.

Frequently asked questions

How quickly can you get to me?

For most areas of Hampshire, we can reach you within 60 minutes. Southampton, Portsmouth, Eastleigh, Fareham, and Winchester typically see response times of 30-45 minutes. More rural areas like the New Forest and Test Valley may take slightly longer.

Do you charge a callout fee?

No. We don't charge for turning up. You only pay for the work we actually do.

Can you unblock drains at night?

Yes. We operate a genuine 24/7 service. Whether you call at 2pm or 2am, we'll have an engineer on the way.

What if you can't clear the blockage?

It's rare, but occasionally we encounter blockages that can't be cleared (usually due to collapsed pipes). In these cases, you don't pay for unsuccessful work. We'll explain what we've found, provide a CCTV survey of the problem, and quote for the repair work needed.

Do I need to be home?

For inside blockages, yes. For outside drains that are accessible without entering your property, we can sometimes attend while you're out, though we prefer to show you what we've found and explain the work.

How do I know if the blockage is my responsibility?

Generally, drains within your property boundary are your responsibility. The public sewer (usually under the road or shared between multiple properties) is the water company's responsibility. In Hampshire, this is Southern Water. If you're unsure, we can help you determine where the problem lies.

Can you help with drains that smell but aren't blocked?

Yes. Drain smells often indicate partial blockages, dried-out traps, or ventilation problems. We can diagnose and resolve most smell issues.

Do you do CCTV surveys without unblocking work?

Absolutely. We provide standalone CCTV surveys for homebuyers, property sellers, landlords, and anyone who wants to know the condition of their drains.

What areas of Hampshire do you cover?

All of it. We serve every part of Hampshire, from Farnborough in the north to Lymington in the south, from the New Forest in the west to Petersfield in the east, and everywhere in between.

Are you insured?

Yes. We carry full public liability insurance and employer's liability insurance. We're happy to provide certificates on request.

Do you offer guarantees?

We provide a 30-day guarantee on all unblocking work. If the same blockage returns within 30 days, we'll clear it again at no charge.

Can you deal with shared drains?

Yes. Shared drains serving multiple properties can be complicated, but we deal with them regularly. We can help you identify who's responsible for what and coordinate with neighbours if needed.

Do you work on boats and marinas?

We focus on land-based drainage, but we can help with shoreside facilities at marinas and boatyards across the Solent.

Service areas: Southampton, Portsmouth, Winchester, Basingstoke, Eastleigh, Fareham, Gosport, Havant, Andover, Farnborough, Aldershot, Fleet, Petersfield, Alton, Lymington, New Milton, Ringwood, Romsey, Waterlooville, Hedge End, Totton, and all surrounding areas throughout Hampshire.

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