--- title: Explained: AdBlue in a Diesel Tank Staplehay canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/staplehay-somerset/ location: Staplehay county: Somerset latitude: 50.990510 longitude: -3.122510 service: AdBlue in a Diesel Tank updated: 2026-10-12 --- # Why It Happens and How to Avoid It: AdBlue in a Diesel Tank in Staplehay Keep the motor and ignition off then call 0333 366 0103 now — the rest can wait when AdBlue is already in your diesel tank. Caught before your motor runs, it's normally a drain and a thorough flush, done where the car is around Staplehay. Reading in advance? In that case what follows explains why it comes about and what to prevent it ever happening. ## AdBlue in a diesel motor: two tanks, two fillers Diesel feeds your motor — yet plenty of modern diesels seen round Staplehay and Sweethay hold another liquid as well. Stored in a tank of its own, AdBlue is sprayed into the exhaust stream to clean it. There's a filler on each tank. Many of cars share a single flap for both, while others move the AdBlue filler to the boot or under the bonnet. The diesel side is topped up at the petrol pump all the time. Rarely filled, AdBlue normally goes in from a bottle, tipped by a driver who has to stop and think which cap to use. Mistakes happen in the gap between them. ## How AdBlue in your diesel tank takes place around Staplehay It is rarely carelessness. Three things tend to line up. To start with, the warning. Low AdBlue brings a message from the vehicle, and letting it run out means limp mode — hence a hurried top-up, maybe before work off Patrick's Way, or at The Winchester Arms on the way home that evening. Then your car is new. A hire car, a new car or a company car puts the fillers where your last one did not, and your hand reaches for the cap it would have used on the old one. A spouted bottle finds no obstacle at a diesel filler any more than at an AdBlue one. So the tip, once started, keeps on. Canonsgrove or the middle of Staplehay: it takes the same few seconds either way. ## How to tell the AdBlue filler from the diesel one Before you pour anything, whether on a drive in Dipford or a forecourt in Staplehay, check these. They take a few seconds. - The cap. The AdBlue cap is commonly blue, or marked "AdBlue". The diesel cap normally isn't. Read it instead of going by position. - Plenty of vehicles give AdBlue the smaller neck of the two. - Lift the filler flap and look for a label — many cars show which belongs in which inlet right there. - Can't find it beside the diesel inlet? In that case check below the bonnet or inside your boot — the owner's manual says where. - Collecting a hire or company car, say at the car park outside Taunton? Ask whoever drove it last before you set off, not once the light goes on. ## Keeping AdBlue out of your diesel tank when you top up For the day the light comes on — wherever you are across Somerset — a simple routine to use. - Not in a rush on the side of Honiton Road, not on a slope, not with the engine running: park and switch off properly. - Say "AdBlue" out loud as you unscrew the cap, after finding the AdBlue filler and reading it. Silly, yes, but it does the trick. - The diesel cap stays on. Where both sit under a flap, confirm it is shut before the bottle comes up. - Using the bottle's own spout, pour slowly — and stop when it is full or the bottle is empty. - Close the cap, then look once more — making sure the diesel filler stayed closed throughout. Only then, start the car. Stop there if you find, at step two or three, that you have already poured into the diesel side. Skip stage five entirely. ## Already put AdBlue in your diesel tank in Staplehay? Then the order of things is short. Do not start the engine. Don't switch the ignition on; on many diesels that alone runs the fuel pump. Do not top up with diesel to thin it: AdBlue doesn't mix with diesel, it sinks to the bottom of the tank, where the fuel is sucked from. If you're on a forecourt, whether it's the Shell or the Texaco, ask the attendants to help roll your car clear of the pump. If you're on your own driveway in Staplehay, leave the vehicle where it stands. Already started? Pull over when it is sensible, then turn off. The next exit is the place to leave when you're on the M5, under a mile from Staplehay. Mileage matters — a quick hop across Staplehay is a smaller job than heading under 50 miles towards Wells — so tell us about how far it went. ## Our arrival in Staplehay, and what happens next We come to the car wherever it has stopped, whether that's outside Trull Church of England VA Primary School, near Trull Memorial Hall or on your own drive. What liquid was put in, the quantity, and if it ran: our engineers ask since the answers set the work and price. During the phone call itself, you hear the quote — before anything else. The fuel system is then cleaned thoroughly, once the tank is emptied. Unlike petrol, AdBlue forms crystals and eats at some fuel-system metals, and none of it washes away unaided. That is why it counts more. A test is at the end: before that, clean diesel goes in, and your filter is flushed or replaced as needed. We don't go until it has been fired up and is running properly. Most jobs are done in roughly half an hour once our engineers arrive, provided your motor hasn't run — and the pumps we use are safe on a live forecourt yet quiet at night beside a house. The insurer usually wants the engineer's report and the VAT invoice, and you get both at the end. Payment comes on the day, with no deposit. Misfuelling cover is part of plenty of insurance policies — and so use the wait to check yours. ## About Staplehay Staplehay is a suburban area situated on the riverside in Somerset, with a relatively low elevation of 54 metres. Staplehay lies near several other small settlements, including Canonsgrove, Trull, and Eastbrook, and is around 25 miles from the city of Wells. Staplehay has a population of approximately 740 people, predominantly living in detached houses. Staplehay is also located at a distance of around 134 miles from London, making it a relatively rural suburb in the South West region. ## AdBlue drains around Staplehay and across Somerset Being a residential suburb, Staplehay shares its vans nearby places — Trull, Eastbrook — all the way across TA postcodes and the surrounding area around them. Fastest of all: give a TA3 7 postcode for our van. There's no need to move the vehicle. A drive, a lay-by on the way to King George's Field, a side street near Trull Church Community Centre: we drain the vehicle where it stands. If you're close to a border, or somewhere hard to describe like the back of All Saints, ring and ask instead of guessing. ## The short version for Staplehay drivers Before you tip, read the cap. Still AdBlue in your diesel tank? Petrol in Diesel will drain it wherever it stands, anywhere in Somerset: switch it off and call 0333 366 0103.