Emergency Drain Unblocking Basingstoke | What To Do Now

It's gone midnight. There's water backing up through your shower tray, or worse, raw sewage sitting in your downstairs loo. The kids are asleep, you're in your dressing gown, and you have absolutely no idea what to do next.

Take a breath. Blocked drains are genuinely stressful, but almost none of them are the catastrophe your panicked brain is currently constructing. Here's what to do right now, in order, before anyone turns up at your door.

First: work out what you're actually dealing with

Not all blocked drains are equal, and the first two minutes you spend figuring out which kind you've got will save you from making things worse.

Check one fixture, then another. If the kitchen sink is backing up but every other tap and toilet in the house is fine, you've almost certainly got a localised blockage, probably in the branch pipe under the sink or just outside the house. Annoying, not urgent.

If two or more fixtures are backing up at the same time, or if you flush the toilet and water rises in the shower tray, that's a sign the blockage is further down, in the shared drain that serves the whole property. That's more serious and you'll want an engineer sooner.

If you're seeing raw sewage coming up through a ground-level drain gully outside, or bubbling back into the house through any fitting at ground floor level, treat that as a genuine emergency. Stop using any water in the house immediately.

What to do in the next ten minutes

Stop adding water to the system. This is the single most useful thing you can do at 2am. No flushing, no running taps, no dishwasher, no washing machine. Every litre you push into a blocked drain is a litre that has nowhere to go except backwards.

Check your outdoor inspection chamber. This sounds technical but it isn't. Somewhere in your garden or driveway there's a round or square cover, usually plastic or concrete, flush with the ground. Lift it carefully (a flat-head screwdriver or a coin works on most modern ones). If the chamber is full to the brim, the blockage is downstream of your property, either in your drain as it runs to the sewer, or in the public sewer itself. If it's empty or flowing normally, the blockage is inside your property, between the chamber and the house.

That one piece of information tells the engineer a lot before they even park up, and it tells you whether you need to call Thames Water (for public sewer issues) or a private drainage company like us (for everything from the chamber to your house, and for the sewer lateral if your insurer covers it).

Don't reach for the chemical drain cleaner. I know it's tempting at midnight. The problem is that caustic drain unblockers generate heat as they react, and if the blockage is solid and the pipe is already stressed, you can cause more harm than good. If an engineer is coming in the next hour or two, the product won't have time to work anyway and you'll be handing them a pipe full of corrosive liquid to deal with. Leave the chemicals in the cupboard.

A plunger is fine. If it's a single blocked sink or toilet and you have a decent plunger to hand, give it a go. Cover the overflow hole first (on a sink, that's the small hole near the top of the bowl) to build proper pressure. Ten or fifteen firm plunges. If it clears, brilliant. If it doesn't shift after two rounds of that, stop. You're not going to muscle it out by force, and repeated hard plunging on an already stressed joint isn't a great idea.

When it's a genuine emergency

Most blocked drains can wait until morning. But not all of them.

Call us out immediately if:

• Raw sewage is coming back into the house through any fitting
• Water is rising towards electrical sockets, fuse boards or appliances
• You can smell sulphurous gas (hydrogen sulphide) from any drain opening
• A ground-floor toilet is completely unusable in a property with no upstairs bathroom, especially with young children, elderly residents or anyone with a medical condition that makes access critical
• You're a landlord and a tenant is reporting sewage in the property, you have a legal duty of care and waiting until morning isn't an option

Those aren't situations where a bucket under the sink buys you enough time. Get someone on the phone now.

If you can safely wait a few hours

Some situations, particularly a slow-draining kitchen sink or a single shower that's draining sluggishly, are genuinely fine to leave until early morning. Here's how to hold things steady:

• Put towels down around any fitting that's overflowing or backing up. Old towels you don't mind throwing away.
• If there's standing water in a basin or bath, scoop it out into a bucket and tip it outside rather than trying to drain it through the blocked pipe.
• Make a note of exactly which fixtures are affected and in what order. That information speeds up the diagnosis when the engineer arrives.
• If it's a rental property, keep a written record of when you noticed the problem and what steps you took. That log matters if there's a dispute later.

What happens when the engineer arrives

I'll be straight with you about what out-of-hours drain work actually looks like, because a lot of people have heard horror stories.

We'll ask you a few questions on the phone before we head out, because the answers shape what equipment we bring. When we arrive, the first job is always to locate the blockage properly before we start moving water around. A CCTV drain survey camera goes in through the nearest access point, we watch the live feed together if you want to, and within a few minutes we know exactly where the blockage is and what's causing it.

For most blockages, high-pressure water jetting clears it in one visit. The jet runs at pressures far higher than anything you'd get from a consumer product, and it doesn't just push the blockage along, it breaks it up and flushes the pipe clean behind it. Grease buildups, compacted wipes, root intrusion, silt, all of them respond to jetting.

If the CCTV shows a structural problem, a collapsed section, a cracked pipe, a root that's broken through the pipe wall rather than just growing into it, we'll tell you exactly what we've found and what the options are. Remedial work like relining or pipe replacement carries a 20-year guarantee. Blockage clearance doesn't, because the underlying cause of future blockages is outside our control once we've left, but we'll always tell you if we think you're going to see the same problem again without a fix.

The most common causes of late-night blocked drains in Basingstoke

For what it's worth, these are the calls we take most often after dark across the RG21 to RG29 area:

The older estates across Brighton Hill, Popley, Winklebury and South Ham have a higher proportion of clay-pipe drainage that was laid in the 1960s and 70s. Clay pipe is actually very durable, but the joints can fail over decades, and root ingress through those joints is common. If you're on one of those estates and you've had repeat blockages, a CCTV survey is worth having once the immediate problem is cleared, because jetting a pipe that's partially collapsed just puts the same call back three months later.

Newer builds in Chineham, Hatch Warren and Kempshott tend to have plastic drainage which holds up better structurally, but is just as vulnerable to what people put down it.

A word on Thames Water and the boundary question

A lot of people don't know where their responsibility ends and the water company's begins. The basic rule is this: everything inside your property boundary, including the pipes that run from your house to the shared sewer in the road, is yours to maintain. Thames Water is responsible for the public sewer itself.

If the inspection chamber in your garden is full, the blockage is almost certainly in your private drain. If the chamber is clear and your neighbours are also having problems, there may be a public sewer issue downstream. Thames Water has a 24-hour emergency line for that, and they'll investigate public sewer blockages for free.

Where it gets complicated is lateral drains, the section of pipe that runs from your boundary to the sewer under the public road. Responsibility for those transferred to Thames Water in 2011, but only for properties that were connected before that date. Some insurers also cover private drain repairs under home emergency cover. Worth checking your policy before you call anyone.

If you're not sure, call us anyway. We'll tell you honestly on the phone whether it sounds like a Thames Water job or ours, we're not going to send an engineer out if the call belongs to someone else.

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Drainsco covers Basingstoke and the RG 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 we start any work. If you're staring at a backed-up drain right now, call us and we'll talk you through it.