Burst Main or Blocked Drain Tewkesbury | Tell the Difference

Water where it shouldn't be is never a good sight. But whether you're standing in a wet patch outside a property on Barton Street, watching a puddle creep across your car park on the Mythe Road trading estate, or staring at a drain that's gurgling and backing up into your yard, the first question matters: is this a burst supply pipe, or is it a blocked drain? The answer changes who you call, how fast you need to move, and what you're responsible for paying.

These two problems get confused all the time, and it's understandable. Both can produce standing water. Both can appear suddenly. And both feel urgent at seven in the morning when you've got a business to open.

What You're Actually Looking At

Start with the basics. Your property connects to two entirely separate systems.

The supply pipe brings clean, pressurised water in. It runs from the water main under the street, through your stopcock, and into your building. If this pipe bursts or cracks, water is being pushed out under mains pressure. It doesn't stop until the pressure is cut.

The drainage system takes wastewater away. It's gravity-fed, running from your sinks, loos, baths and gullies out to the sewer. If something is blocking the flow, wastewater backs up instead of moving on.

Those are fundamentally different failures. The clues they leave are different too.

The Tell-Tale Signs of a Burst Supply Pipe

Mains water under pressure behaves in a particular way. Look for:

• A wet patch on the pavement, garden or road that wasn't there yesterday and is persistently wet even in dry weather
• Water that appears to be running or trickling continuously, not sitting stagnant
• A sudden drop in water pressure inside the building, or no water at all
• Your water meter (if you can access it) is spinning even when every tap in the building is turned off
• The water looks clean and clear, not discoloured or smelling of sewage
• In cold snaps, a pipe that's cracked rather than burst might show as a trickle that freezes overnight, then reappears when it thaws

In Tewkesbury's older streets around the High Street, Church Street and the Abbey precinct, supply pipes are sometimes Victorian-era lead or early copper. They're more vulnerable to ground movement and pressure spikes than modern plastic pipe. A burst here isn't a rare event.

The Tell-Tale Signs of a Blocked Drain

A drainage problem produces a different set of symptoms entirely:

• Water backing up out of an external gully, drain cover or inspection chamber
• Foul smell, the kind that makes it obvious you're dealing with wastewater, not clean supply water
• Multiple fixtures inside the building slow to drain at the same time (a sign of a shared drain being blocked downstream)
• Gurgling sounds from drains or toilets when other fixtures are used
• Water sitting in a yard or car park after rain that takes far too long to clear
• No change in your internal water pressure at all

If your internal water pressure is fine and the water pooling outside smells bad, you've almost certainly got a drainage issue, not a supply problem.

A Quick Comparison

Who Actually Deals With Each Problem

This is where people waste time. A burst supply pipe under the public highway is Severn Trent Water's responsibility. You can report it on their 24-hour line (0800 783 4444) and they'll send a team out. No charge to you.

If the burst is on your private supply pipe, the section between the boundary of your property and your internal stopcock, that's your responsibility as the property owner. You'll need a plumber or a specialist contractor, not the water company.

A blocked or damaged drain that sits within your property boundary is your responsibility too, unless it's a shared sewer that serves multiple properties, in which case Severn Trent Water takes over responsibility (this changed under the 2011 transfer of private sewers).

Drainsco handles the drainage side: blockage clearance using high-pressure water jetting, CCTV drain surveys to find exactly where the problem is, root cutting, drain repairs and relining. We don't do plumbing or mains repair work, that's not what our engineers are equipped for. What we can do is tell you quickly, using a CCTV survey, whether your problem is a drainage failure or something else entirely.

The Grey Area: When You're Not Sure

Sometimes the symptom is ambiguous. A wet patch outside a property on Priors Park or Northway could be a supply pipe weeping slowly underground, or a cracked drain leaking outward. In clay-heavy ground around Walton Cardiff and Twyning, drains can crack and leak outward rather than causing an obvious backup inside.

If you genuinely can't tell, the fastest way to get an answer is a CCTV drain survey. We put a camera through the drain system and within minutes you can see whether the pipe is structurally intact and clear, or whether there's a crack, a root intrusion, or a blockage. If the drain is clean and intact, the problem is more likely to be a supply-side issue and we'll tell you that plainly.

Don't sit on it. A burst supply pipe can undermine ground quickly, especially in the town centre where old sewer infrastructure runs close to building foundations. A blocked drain that's backing up into a commercial kitchen is a food hygiene issue within hours.

What to Do Right Now

If you suspect a burst supply pipe: 1. Turn off your internal stopcock to stop water flow through your property's pipework. 2. If the wet patch is on the public highway or pavement, call Severn Trent Water immediately on 0800 783 4444. 3. If it's within your boundary, call a plumber.

If you suspect a blocked drain: 1. Avoid using any fixtures that drain to the blocked pipe. It makes the backup worse. 2. Don't pour anything down the drain to try to clear it. Hot water won't shift a solid blockage and chemicals can damage older clay pipes. 3. Call a drainage contractor.

Drainsco covers Tewkesbury and the GL20 postcodes, with engineers available 24 hours a day, seven days a week. There's no call-out fee, and you'll get a clear price before any work starts. If you're not sure what you're looking at, call and describe what you can see. We can usually help you work out which way to go before we even leave the yard.