A blocked drain can turn a normal morning into a stressful mess. Knowing what to do first and who is responsible for fixing the problem saves you time, money, and potential damage to your property.
Key Takeaways
- Stop using water immediately, check whether the situation is an emergency, and try simple at-home checks like using a plunger or removing visible debris.
- Responsibility depends on whether the blockage is in private drains within your property boundary, a shared sewer, or the public sewer network.
- Homeowners usually pay to clear blocked pipes on their own property, while the local water company or local authority handle public sewers and road gullies.
- If you are in Plymouth or nearby, you can contact a professional drainage contractor for fast 24/7 help.
- This article also covers landlords vs tenants, septic tank responsibility, and links to further reading on whether a blocked drain is an emergency.
What To Do Immediately When You Have a Blocked Drain
If you’ve just noticed a blocked drain in your Plymouth home, don’t panic. Look for these signs: water draining slowly from sinks, showers or baths, gurgling sounds from your toilet, foul smells near drains, or damp patches in the garden.
Your first steps:
- Stop running water in affected fixtures (toilet, kitchen sink, washing machines) to prevent flooding.
- Check whether sewage is backing up into your house or you have no usable bathroom. If so, treat it as an emergency.
- Remove visible debris from drain openings and gully grates – leaves, hair, soap scum.
- You can clear a blocked drain using hot water, a plunger, or cleaning the P-trap under a sink. Pouring hot water can help melt grease or soap buildup. Baking soda and vinegar can work as a natural remedy for unclogging drains.
- Chemical drain cleaners can be hazardous and may damage pipes if misused – avoid them alongside makeshift tools.
If basic checks don’t resolve the problem within an hour or two, it’s time to work out where the blockage is located and who should pay for fixing it.
Who Is Responsible: Private Drains, Shared Sewers and Public Sewers
After the 2011 Private Sewers Transfer, responsibility in England and Wales depends on pipe type and location.
- A drain carries wastewater from a single building. A sewer collects wastewater from multiple buildings. Most sewers are publicly owned and maintained by water companies.
- Private drains are the pipes within your property boundary serving only your house. Homeowners are responsible for private drains within their property boundary and must clear blockages in them.
- Lateral drains are shared pipes connecting properties to sewers. Shared sewers and lateral drains beyond the boundary are usually the water company’s responsibility – in Plymouth, that means South West Water is responsible for lateral drains and public sewers.
- The public sewer under roads and pavements is the water company’s duty. Contact them if a blockage is clearly outside your property.
- Highway gullies and road gullies that drain surface water from streets are the local authority or local council’s responsibility.
- If your property uses a septic tank or private sewer instead of the public sewer, the property owner is responsible for maintenance, emptying and repairs under the general binding rules.
If you’re unsure who owns a section of pipe, check your property deeds, request sewer maps from your local water company, or ask your council for guidance.
How To Work Out Where the Blockage Is
This step helps you decide whether to call a drainage contractor, or your water company.
- Note which fixtures are affected. If only one sink or toilet is blocked, the problem is probably in internal pipework on your ground floor or bathroom. If multiple drains are affected, it may indicate a larger drainage issue further along the system.
- Check if neighbours have drainage problems. If they do, the blockage is likely in a shared sewer or public sewer rather than your private drains.
- Safely lift an inspection cover within your garden. If wastewater is standing high, the blockage is downstream. If your chamber is clear but one closer to the street is full, the issue is outside your private drains.
- Flat dwellers and those in terraced houses should note that shared sewers are common – contact your water company if several properties on the same run are affected.
- Commercial kitchens have additional duties to stop grease entering the public sewer and should arrange specialist drainage help for repeated blocked pipes.
Landlords, Tenants and Different Types of Property
Who pays can depend on whether you own, rent, or share the property.
- Landlords must repair blocked drains caused by structural plumbing issues – old or collapsed pipework, repeated drainage problems due to age. This is their duty under housing standards.
- Tenants must maintain drains within their rented property. Blockages often occur from flushing inappropriate items down toilets – wet wipes, sanitary products, cotton buds, or pouring waste cooking grease down sinks. Misuse can make a tenant liable.
- In flats, individual units cover internal pipework. The water company or freeholder typically handles a blocked drain outside the property in shared sewers serving multiple units.
- Properties sharing a private sewer or septic tank (common in rural Devon) split upkeep and costs proportionally among owners.
Clear tenancy agreements that state who deals with maintaining drains and how to report problems reduce disputes.
When and How To Call in Professional Help
Persistent or severe blockages need professional attention to prevent sewage flooding and health risks.
- Drainage company: for repeated external blockages within your property boundary, tree root ingress, CCTV surveys, or collapsed private drains, contact an independent drainage contractor.
- Water company: contact South West Water directly if the blockage is in the public sewer or a shared sewer. They should clear these at no direct cost to you.
- Local authority: report blocked highway drains, gutters overflowing onto the street, or surface water flooding on roads to the highway authority or council.
- Insurance: many policies cover accidental damage to underground private drains but require professional reports. Check your policy and ask contractors for written evidence.
- Plymouth residents can arrange 24/7 emergency unblocking, CCTV surveys, and repairs from a local specialist.
Prevent future problems with the 3 Ps rule: only pee, poo and toilet paper go down the toilet. Bag and bin wet wipes and sanitary products. Trap cooking fat in a container – never pour it down sinks. Avoid pouring cooking fats, oils, or grease down drains to prevent blockages. It’s best to call a professional drainage engineer if wastewater backs up into multiple fixtures rather than attempting complex repairs yourself.
Frequently Asked Questions About Blocked Drain Responsibility
Below are common questions not fully covered above.
Who do I call first if I’m not sure whether my blocked drain is private or public?
If sewage is backing up into your property, treat it as urgent – call a professional drainage company or drainage engineer immediately. In non-urgent cases, ring your water company’s customer services, describe the location of affected manholes, and they can advise whether it falls under their responsibility or yours.
Can the water company refuse to clear a blockage in a shared sewer?
For adopted shared sewers connected to the public network, the regional water company must investigate and carry out repairs. They may refuse if the pipe is still an unadopted private sewer, in which case all owners served by that pipe must arrange and fund clearance themselves.
What happens if my septic tank overflows or backs up?
The property owner is fully responsible for emptying, maintenance and dealing with overflows. Contact a licensed waste carrier for emptying and inspection. The Environment Agency can become involved if pollution reaches nearby land or watercourses.
Can my local authority force me to repair or replace faulty private drains?
Under public health legislation, a local authority can serve notice requiring owners to unblock or replace defective private drains that cause a nuisance or health risk. If owners do not comply, the council can carry out the work and recover costs – sometimes placing a legal charge on the property.
Will my home insurance cover the cost of fixing a collapsed drain?
Many buildings insurance policies cover accidental damage to underground private drains from tree roots or ground movement, but not routine unblocking caused by waste like wipes and fat. Check your policy wording, report damage promptly, and ask your drainage contractor for a written report and CCTV footage to support any claim.