Water in the petrol tank in Thornbury, drained on the spot
If the engine has not run, water in the petrol tank in Thornbury is usually a clean drain with no lasting harm. Keep it that way — don't start it — and ring 01295 380724. The call-out is £89, the drainer brings everything, and most jobs are done in 1 to 2 hours.
What matters most is whether the fuel has moved beyond the tank. Water in petrol gives misfires, stalling and non-starts; the tank is drained, the lines flushed and fresh fuel added.

The short version: water in the petrol tank in Thornbury
| Place | Thornbury |
|---|---|
| Area | Bristol |
| Postcodes | BD3, BS12, BS35 |
| Job | Water in the petrol tank |
| Price | Call-out from £89, full price quoted first |
| Time on site | 1–2 hours |
| Who attends | A local drainer with a pump and sealed tank |
| Phone | 01295 380724, 24 hours |
What the drainer does when they reach you in Thornbury
On a forecourt the drainer will usually move the vehicle off the pump lane first, by hand, with the engine off. Then it is drain, flush, refuel and start. At home or at work they can do the whole thing on the drive or in the car park without moving it at all.
Before you agree a price: what to ask
A drainer should be happy to answer all of these on the phone. If they will not give a price before travelling, ring someone else.
- Is the vehicle over 3.5 tonnes, and does that change the price?
- Is there an extra charge at night or at the weekend?
- Do you take card payment at the roadside?
- How long until you reach me in Thornbury?
- What is the total, not just the call-out, if it is a straight drain?
What to do right now
- Stop. Do not start the engine, even for a moment.
- Note the fuel type, the amount you put in and whether the car was already low.
- Ring 01295 380724 and give the location — a postcode or the filling station name is enough.
- Get the full price and an arrival time before you agree.
- A drainer attends, drains and flushes the fuel system where the car is parked.
- Clean fuel goes in, the engine is run, and you drive to the next forecourt to fill up.
Thornbury postcodes
We cover postcode districts BD3, BS12, BS35 and the surrounding streets in Bristol. Give the operator your postcode and you will get an arrival window.
Where you can be drained in Thornbury
Forecourt staff in Thornbury see this every week and will usually let the vehicle sit in a bay until the drainer arrives. Otherwise the drainer can work on your drive, at your workplace or at the kerb outside.
Calls from Rudgeway, Almondsbury, Barkerend and Bradford Moor go to the same drainers as Thornbury.
How much it costs in Thornbury
| What happened | What the drainer does | Price | Time on site |
|---|---|---|---|
| Caught at the pump | Pump out, flush, clean fuel in | Call-out from £89 | 45–90 mins |
| Ignition turned on | Pump out and flush the filter | Given on the phone | 1–2 hours |
| Driven away from the forecourt | Pump out, flush, pump and injector checks | Given on the phone | Up to 3 hours |
| Vehicle stopped running | Pump out, flush and fault-finding | Given on the phone | Depends on the fault |
| AdBlue went in the wrong tank | Complete drain and flush | Quoted per vehicle | Up to 3 hours |
| Price ranges | The call-out, then the drain | Call-out £89–£199 · drain £199–£1,999 | — |
Other drains in Thornbury
Drainers nearby
More of Bristol
From the drainer's notebook
Fuel Fixer, the company behind Wrong Fuel Drain, holds a rating of 4.8 out of 5 from 2,190 reviews on Trustpilot, on a profile claimed since 2017.
Across recent reviews, the themes customers raise most often are staff who stay polite, professional and reassuring during what is a stressful situation, and how quickly a technician arrives and gets the vehicle back on the road in Thornbury.
The most common criticism is price. Some customers have felt the cost of an emergency drain was steep for a job that takes under two hours, and that is fair comment on an emergency call-out. It is why the misfuel call-out fee now starts at just £89 and why the full figure is quoted on the phone before a technician sets off — so nothing about the cost is a surprise at the roadside.
Common questions
How quickly can a drainer reach me in Thornbury?
Usually the same day and often within a couple of hours. The operator gives you an arrival window on 01295 380724 before you agree.
How long does a drain take in Thornbury?
Usually 1 to 2 hours on site once the drainer arrives. Longer if the engine was started, because the filter and lines need flushing as well as the tank.
What happens to the fuel you take out?
It goes into a sealed tank on the drainer's van and is taken for licensed disposal and recycling. It is never tipped away.
Do you work at night in Thornbury?
Yes. Drainers work 24 hours a day, including weekends and bank holidays.
Can I drive to a garage with water in the petrol tank?
No. Every mile pushes the fuel further through the pump and injectors. A drainer comes to you, so there is no reason to move the car under its own power.
I only put a little in — do I still need a drain?
In most modern diesels, yes. Even a small amount of petrol reduces the lubrication the pump depends on. A drain is cheap compared with a pump.
Who you are dealing with
Wrong Fuel Drain is a brand of Fuel Fixer Ltd (company number 08520551), a company of Fuel Fixer International, the multinational group behind this website. Fuel Fixer International is owned by Stockbridge Capital Holdings, a private equity group. Work is carried out by Fuel Fixer Ltd technicians under ISO 9001 and ISO 14001, with Environment Agency waste-carrier registration.
North of the border, Fuel Fixer Scotland runs the same service across every Scottish postcode.
Across the network
Fuel Fixer sites: Fuel Fixer · Misfuel Doctor · UK Wrong Fuel Repository · Fuel Fixer Scotland
Forecourt Assist sites: Forecourt Assist · AdBlue in Fuel · Wrong Fuel Cumbria · Wrong Fuel Teesside · Wrong Fuel Carlisle · Wrong Fuel Penrith · Wrong Fuel Keswick · Wrong Fuel Kendal · Wrong Fuel Workington · Wrong Fuel Maryport · Wrong Fuel Whitehaven · Wrong Fuel Newcastle · Wrong Fuel Gateshead · Wrong Fuel Sunderland · Wrong Fuel Durham · Wrong Fuel Darlington · Wrong Fuel Middlesbrough · Wrong Fuel Dumfries
Also in the group: Motor Servicing
Background reading: HMRC rebated fuel guidance. Service operated by Fuel Fixer, alongside Wrong Fuel, Fuel Fixer Scotland and Motor Servicing, part of Fuel Fixer International and owned by Stockbridge Capital Holdings.