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BRISTOL DRAINAGE GUIDE
How much does drain unblocking cost in Bristol?
Real prices for clearance, jetting, surveys and repairs — what moves them, the charges worth questioning, and how to compare two quotes that look nothing alike.
AL
Anthony Lord
Owner, Flow Sure Drains
Updated [DATE]
9 min read
- THE SHORT ANSWER
A standard domestic drain clearance in Bristol starts from £160. CCTV surveys start from £160 no vat to pay., and repairs run from P.O.A for a patch lining up to P.O.A and beyond where excavation is unavoidable.
Those are our prices, fixed on arrival before any work starts, with no call-out fee and no weekend premium. Below is what moves them, and what to ask anyone quoting you something different.
Our prices
Published in full, because you shouldn’t have to ring three companies to find out what a job costs. Every figure is a starting price for a straightforward job at a domestic property, agreed on site before work begins.
Job
From
Blocked drain clearance
£[CLEARANCE]
Blocked toilet
£[TOILET]
Blocked sink, bath or shower
£[SINK]
High-pressure jetting
£[JETTING]
CCTV drain survey
£[SURVEY]
Homebuyer drain survey
£[HOMEBUYER]
Patch lining repair
£[PATCH]
Full pipe reline
£[RELINE]
Excavation and replacement
£[EXCAVATION]
Commercial call-out
£[COMMERCIAL]
Planned maintenance, per visit
£[CONTRACT]
No call-out fee, and no out-of-hours premium. A drain blocking at 8pm on a Sunday is not a reason to charge more for it. If you decide not to go ahead once you’ve heard the price, there’s nothing to pay and we leave.
What moves the price
Six things, in roughly the order they matter.
1.Where the blockage is
A trap under a sink is minutes of work. A blockage forty metres along a shared run, reached from a chamber that’s under a patio, is not. Distance and accessibility are the biggest single factor.
2. What’s causing it
Wipes come out. A hardened fat line needs jetting. Roots need a cutting head. A collapsed pipe needs repairing, and no amount of clearing will substitute.
3. How many runs are involved
One blocked gully is one job. A property where the kitchen run, the bathroom stack and the main drain all need attention is three, and should be priced as such rather than as three separate visits.
4. Access
Rear lane access is quick. Carrying equipment through a house, working in a basement lightwell, or lifting a chamber cover that’s been paved over all add time. Access is why the same fault can cost differently in Bedminster and Clifton.
5. Whether it needs diagnosing as well as clearing
If a drain has blocked repeatedly, clearing it again is treating a symptom. A camera adds cost on the day and usually saves money within the year.
6. Reinstatement, if it comes to that
On excavation work, putting the surface back is frequently the larger half of the bill. Re-laying block paving or a driveway costs more than the drainage work underneath it — which is the main reason we line pipes from the inside wherever it’s possible.
Why nobody should quote you firmly over the phone
We won’t give a binding price for a job we haven’t seen, and you should be cautious of anyone who does.
The reason is simple: from a phone description, a blocked drain and a collapsed drain sound identical. Both are “water not going away”. One is an hour’s work and one is a repair. A firm phone quote is either padded to cover the worst case, or it’s going to change when the engineer arrives — and the second is how people end up with a bill that doesn’t match what they agreed.
What you should get on the phone is an honest indication: what it’s likely to be, what would push it higher, and what we’d need to see to be certain. Then a fixed price on site, before anything starts.
Charge worth questioning
Not every company works the way we do. These are the ones that most often turn a quoted price into a larger invoice.
- WATCH FOR
Call-out fees
A separate charge just for arriving, sometimes payable even if you decline the work. Ask whether it’s refundable against the job, and what happens if you say no.
- WATCH FOR
Hourly rates
Fine in principle, expensive in practice. You’re carrying the risk of a job taking longer than expected, and you have no idea what the total will be until it’s done.
- WATCH FOR
Out-of-hours premiums
Evening, weekend and bank holiday surcharges — often 50% or more. Drains rarely block at convenient times, which is precisely why we don’t apply one.
- WATCH FOR
“No fix, no fee” with condition
Reasonable on the face of it. Read what counts as a fix — some define it narrowly enough that almost any outcome qualifies.
- WATCH FOR
Surveys recommended on every job
A survey is genuinely valuable when a drain keeps blocking or you’re buying a house. On a first-time blockage that cleared easily, it usually isn’t necessary.
- WATCH FOR
A repair quote with no footage
If someone proposes excavation without showing you why, ask to see the camera work. A repair recommendation should always come with the evidence behind it.
How to compare two quotes
Quotes for drainage work are notoriously hard to compare because they rarely cover the same things. These questions make them comparable.
- Is that the total, or a starting figure?
“From £X” and “£X” are very different sentences.
- Is that the total, or a starting figure?
“From £X” and “£X” are very different sentences.
- Is that the total, or a starting figure?
“From £X” and “£X” are very different sentences.
- Is that the total, or a starting figure?
“From £X” and “£X” are very different sentences.
- Is that the total, or a starting figure?
“From £X” and “£X” are very different sentences.
- Is that the total, or a starting figure?
“From £X” and “£X” are very different sentences.
- Is that the total, or a starting figure?
“From £X” and “£X” are very different sentences.
Want a straight answer about your drain?
Describe what’s happening and we’ll tell you what it’s likely to be and what it’s likely to cost — before anyone gets in a van.
You may not be paying for this at all
Before comparing anyone’s prices, it’s worth establishing whether the drain is yours.
If the blocked run serves more than one property — a shared drain between terraced houses, or the single original drain in a converted building — it is very likely a lateral drain, and since 2011 that has generally been the water company’s responsibility rather than the householder’s. In this area, Wessex Water. They attend at no charge, and clear and repair at no charge where it’s theirs.
The cheapest drain unblocking in Bristol is the one you don’t pay for. If your neighbours have the same problem at the same time, stop and read this first: who is responsible for a blocked drain in Bristol.
When paying more actually saves money
There’s one situation where the cheapest option on the day is the expensive one over a year.
If the same drain has blocked more than twice in the same place, each clearance is treating a symptom. Something in the run is catching everything that passes — roots through a joint, a displaced section, or a pipe laid at the wrong fall. A third clearance will work, briefly, and then you’ll pay for a fourth.
A CCTV survey at £160 no VAT to pay costs less than two more clearances and tells you what’s actually wrong. If it’s a fault, most can be repaired from inside the pipe without digging. If it’s nothing structural, you’ve spent £160 no VAT to pay to stop worrying about it.
The same applies before buying a house. A standard homebuyer survey doesn’t inspect the drains, and a drainage repair discovered after completion is entirely yours.
Common questions
How much does it cost to unblock a drain in Bristol?
A standard domestic clearance starts from £120 no vat to pay, agreed as a fixed price on arrival before work begins. There’s no call-out fee and no extra charge for evenings, weekends or bank holidays.
What moves it is where the blockage sits, what’s causing it, how accessible the chambers are, and whether more than one run needs attention.
Why won't you quote a firm price over the phone?
Because a blocked drain and a collapsed drain sound identical over the phone, and they’re very different jobs. A firm phone quote is either padded to cover the worst case or it changes on arrival.
What we will do is tell you honestly what it’s likely to be and what would push it higher, then give you a fixed price on site before starting.
Do you charge more at weekends or in the evening?
No. The same price applies at weekends, evenings and bank holidays. Drains rarely block at convenient times and charging extra for that has never seemed reasonable to us.
Is a CCTV drain survey worth the money?
It depends on the situation. If a drain has blocked more than twice in the same place, yes — at £160 no VAT to pay it costs less than two more clearances and identifies what’s actually causing it.
If you’re buying a property, also yes, since a standard homebuyer survey doesn’t inspect the drains. On a one-off blockage that cleared easily, usually not, and we’ll say so.
How much does it cost to repair a drain?
Patch lining starts from P.O.A, a full pipe reline from P.O.A, and excavation from P.O.A.
Most faults can be repaired from inside the pipe, which is considerably cheaper than digging — largely because reinstating a driveway or patio is often the biggest single cost on an excavation job.
Will my insurance pay for it?
Clearing a blockage is usually treated as maintenance and isn’t typically covered. Damage from an event — subsidence, ground movement, accidental damage during building work — more often is, while gradual wear is commonly excluded.
Any claim needs footage and a written report, which we produce as standard.
Is there a cheaper option than calling someone out?
For a slow kitchen sink, a kettle of very hot water and a plunger is worth trying before you call anyone. We’d rather tell you that than take money for something you could do in five minutes.
Chemical drain cleaners are generally not worth it — they rarely clear a real blockage, can damage older pipework, and make the job more hazardous for whoever opens it up.
Do you take payment on the day?
For domestic work, yes. For commercial customers we invoice and can work to purchase orders, so no card payment on the day is needed.
Anthony Lord
Owner, Flow Sure Drains
Anthony runs Flow Sure Drains, an independent drainage company working across Bristol and Bath. These are the prices we actually charge, published because customers shouldn’t have to ring three companies to find out what a job costs.
Prices are starting figures for straightforward domestic jobs and are always agreed on site before work begins. Other companies price differently, and a cheaper headline figure with a call-out fee, an hourly rate and a weekend surcharge attached is frequently the more expensive job.
Related reading
Who's responsible for a blocked drain?
Yours, Wessex Water's or the council's — and why it's often not your bill at all.
CCTV drain surveys
When a survey is worth paying for, and when we'll tell you it isn't.
Blocked drain clearance
What actually happens on the day, and what the fixed price covers.
Tell us what's happening and we'll price it
Postcode and a description is enough for an honest indication. Then a fixed price on site, before any work starts — and nothing to pay if you’d rather not go ahead.