--- title: AdBlue in a Diesel Tank Purbrook: Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/purbrook-hampshire/ location: Purbrook county: Hampshire latitude: 50.864710 longitude: -1.027810 service: AdBlue in a Diesel Tank updated: 2026-10-15 --- # Preventing AdBlue in a Diesel Tank in Purbrook: Why It Occurs Keep your motor and ignition off then ring 0333 366 0103 first — reading can wait if AdBlue is already in the diesel tank. Around Purbrook, catching it before your engine runs normally leaves a drain and a full flush where it stands. Reading in advance? Then what follows explains how it comes about and what to prevent it ever happening. ## Two fillers, two tanks: AdBlue in a diesel car Many modern diesels around Widley, like those in Purbrook, carry on two liquids; your engine gets just the diesel. Kept in a tank of its own, AdBlue is fed into your exhaust gas to clean it. Separate tanks, separate fillers. Under one flap, side by side: that is the layout on a lot of cars. On others, AdBlue's filler is under the bonnet or in the boot instead. Diesel goes in at every forecourt call-out, again and again. Rarely topped up, AdBlue usually comes from a bottle, tipped by someone who must stop and think which filler to use. The slip lives in that gap. ## How does AdBlue in your diesel tank occur in Purbrook? Seldom is it carelessness: normally three things line up. The warning comes first. As AdBlue runs low the vehicle tells you, and if it runs out completely, the car drops into limp mode. So the top-up is done in a hurry: on a drive off Stakes Road before work, or in the car park at The Centurion on the way home. Then, your hand reaches for the cap it knew on the old car — because a rental car, a new motor or a company car places the fillers somewhere your last one did not. And the bottle fits. A bottle with a spout goes into a diesel filler as easily as an AdBlue one, and so nothing stops the pour after it has started. Whether it occurs in Crookhorn or the middle of Purbrook, it's the same few seconds. ## Which filler is for AdBlue, and which for diesel? Check these before pouring, at a forecourt in Purbrook or a driveway over in Waterlooville. A few seconds, no more. - The cap. The AdBlue cap is often blue, or marked "AdBlue". Your diesel cap usually is not. Read it instead of going by position. - Look at the size: the smaller filler neck is, on plenty of cars, the AdBlue one. - Look inside the fuel flap: plenty of vehicles carry a label there saying which fuel goes where. - The handbook shows which it is when the filler isn't next to your diesel cap: your boot, or under the bonnet. - Check with the person who drove it last — before you leave, not when the light comes on — when you pick up a hire or company car from somewhere like the car park at Bedhampton. ## AdBlue top-ups that never reach your diesel tank A routine for the day the light comes on, wherever across Hampshire that is. - Not in a rush on the side of Stakes Hill Road, not on a slope, not with the engine running: park and switch off first. - Find the AdBlue filler, check the cap, and speak the name "AdBlue" aloud as you unscrew it. It seems silly. It works. - Leave your diesel cap on. If both sit under one flap, check the diesel cap is still closed before you lift the bottle. - Tip slowly, using the bottle's own spout. Stop when it's full or when the bottle is empty. - Before starting the vehicle, close the cap and look a second time that your diesel cap was never came off. If at step two or three you find you have already poured into your diesel side, stop there. Skip step five altogether. ## Already put AdBlue in your diesel tank around Purbrook? Short list, then. Top of it: your engine remains off. Leave the ignition off as well, since on plenty of diesels it by itself starts the fuel pump. AdBlue doesn't mix with diesel — it sinks to the bottom of your tank, where your fuel is sucked from — so don't top up with diesel to thin it. If you're on a forecourt, whether it's the Asda or the Shell, ask the staff to help push your car away from the pump. On your own drive around Purbrook? So your car stays where it is. Stop as soon as it is safe and switch off, if your engine has already run. Purbrook lies under a mile from the A3(M); there, take the first exit. Mileage counts — a quick hop across Purbrook makes a smaller job than driving under 10 miles towards Portsmouth — so say about how far it went. ## When we get there in Purbrook, what happens? Wherever your car came to rest, whether by St Peter's Catholic Primary School, Waterlooville, near Purbrook Chase Shopping Precinct or on your own drive, the van travels to it. The answers determine the work and our quote, and so our engineers ask what got in, roughly how much, and whether it's run. You get that price on the phone, before anyone sets off. Emptying that tank comes next, followed by a thorough flush of the system. AdBlue crystallises and is corrosive to some of the metals in a fuel system, so it doesn't wash out on its own — which is why the flush matters more here than with petrol. The fuel filter is cleaned, or replaced where it needs to be; clean diesel goes in; and your car is tested. Before leaving, we fire it up and make sure that it is running smoothly. Unrun cars mostly need a half-hour visit after the moment we arrive. The kit is safe on a busy filling station, and quiet enough for a residential street late at night. Payment is on the day, not upfront, and you are given the paperwork your insurer asks for: an engineer's report and a VAT invoice. Plenty of insurance policies include misfuelling cover, and so it's worth checking yours while we are on the way. ## About Purbrook, briefly Purbrook is a locality in Hampshire, situated near the coast and approximately 5 miles north of Portsmouth, with a mix of residential areas and some remaining open spaces. Purbrook has a population of around 2859 people and is characterized by predominantly detached housing. Purbrook is close to other nearby places such as Crookhorn, Stakes, and Farlington, and is about 59 miles southwest of London. ## AdBlue drains in Purbrook and across Hampshire Purbrook is a coastal area, and our teams that cover it also work the towns near it, Stakes and Farlington among them, across the PO postcode area. The van reaches you fastest with a postcode starting PO7 5. No need to shift the vehicle. The drain takes place on the spot, whether a driveway, a road by Phoenix Community Centre, or a lay-by towards Johnstons's Coppice. Tricky to explain, like the back of Church of the Good Shepherd? By a county line? Asking beats assuming, so ring. ## In short, for Purbrook drivers Read the cap before you tip. Even so AdBlue in your diesel tank? Petrol in Diesel can drain it where it is, wherever across Hampshire: keep it off then call 0333 366 0103.