--- title: What Now? AdBlue in a Diesel Tank Hopkinstown canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/hopkinstown-rhondda-cynon-taf/ location: Hopkinstown county: Rhondda Cynon Taf latitude: 51.607490 longitude: -3.361200 service: AdBlue in a Diesel Tank updated: 2026-10-23 --- # What Now? AdBlue in the Diesel Tank in Hopkinstown What to do about AdBlue in a diesel tank depends on one thing more than any other: whether the engine has been run since it got in. Anywhere your vehicle stands — Pwll-Gwaun, Hopkinstown — don't start an engine that hasn't run yet. Phone 0333 366 0103 with the key and engine both off. In Hopkinstown, that is generally drained and cleaned on the spot. If it has run, stop as soon as it is safe and switch off. It's a bigger job, though stage one does not change. Compare your case to a situation from the ones below, wherever around Rhondda Cynon Taf you happen to be. ## On a Hopkinstown forecourt with AdBlue in a diesel You are at the petrol pump, the nozzle or the bottle still in your hand, and you have just noticed the cap you opened was the wrong one. It could be the Asda, or perhaps the Sainsbury's, or another forecourt around Hopkinstown. The point: of every spot to notice, this is the best. The AdBlue is inside the tank and nowhere else. Nothing has pulled it in. Do this: keep out of the driver's seat, however much the pump needs clearing. Three things: a shove into a space with the staff helping, the receipt kept, and a call to us from the forecourt. Stuck by the pump? Explosion-proof kit makes a live forecourt safe, so it can be drained where it is. ## At home in Hopkinstown with AdBlue in the diesel tank The warning light had been on for days. Only by the recycling, the empty container in hand, did you glance back at the cap you had used on the driveway. Houses just off Ty Mawr Road are caught out as often as anywhere else. The point: no driving since makes it nearly equal to finding it at the pump. Diesel and AdBlue stay apart: the AdBlue settles to the floor of that tank and remains put, however long the night. Put your keys indoors tonight — or someone might take it off at breakfast — and call us. In Troedrhiw-Trwyn or right here in Hopkinstown, the drain is done on your driveway. The pumping kit runs quiet enough that it won't wake the neighbours at night. ## Hopkinstown: drove off with AdBlue in a diesel? You filled up, set off, and a mile or two later the engine began to run unevenly, smoke, lose power or light up the dashboard. It might have been heading for Cardiff, under 15 miles away, or just down Hopkinstown Road. The upshot: the system has pulled AdBlue in already. Mileage decides how deep it goes: filter and lines to begin with, then the injection pump and every injector. It goes further with each mile covered and each restart. Pull in safely — that is the next job — then switch everything off. Hopkinstown sits under 10 miles from the M4; there, come off at the first junction rather than pressing on to the services. Don't restart it to see if it has cleared; it will not have. Phone us and say how far you travelled. ## Hire, lease or company car with AdBlue in the wrong tank A week back, it was unknown to you. The AdBlue filler is right next to the diesel filler, which you did not know, because your own car either has no AdBlue or keeps it somewhere else. Anyone, anywhere across Rhondda Cynon Taf, could do it. In short: one extra step on top of the situations above, and those turn on whether it's run. Plenty of hire and company contracts want the owner to approve work on the car. Your move: hire firm or fleet manager to begin with, us next, since settling it beforehand saves time. Stuck by Capel Rhondda or at Trehafod till the firm replies, the vehicle stays switched off throughout. ## Unsure about AdBlue in the diesel tank in Hopkinstown? Now and then, "I think so" is all anyone can honestly say. Too light, the bottle; a trace of ammonia round the filler; a hazy recollection of the cap. Sound familiar? Maybe it happened in a hurry at the school gates at the local primary school, or on a friend's drive in Graigwen. What it means: a little spilled around your filler does no damage to the motor. If it's inside the diesel tank, though, it does. You cannot tell which by turning the ignition, and doing so will suck in any AdBlue that is in your tank. What to do: treat it as if it went in. Don't fire it up. Tell us what you noticed on your phone. A clear tank checked counts as a better result than an already-run one drained. ## What each AdBlue drain in Hopkinstown has in common Whichever scenario you are in, this job starts the same way. Our engineers come to the vehicle, whether it is on a forecourt, a drive, the car park at The Merlin or a side street close to Pontypridd RFC, and ask three things: what got in, roughly how much, and if the engine has run. Answers shape the job; the quote comes by phone while no one has left yet. Then your tank is emptied and the system cleaned thoroughly, which matters more with AdBlue than with petrol: AdBlue crystallises and is corrosive to some of the metals in a fuel system, and so it does not rinse out on its own. Finally come your filter, flushed or replaced as needed; fresh diesel; and a test of the car. If the motor hasn't run, most jobs take about half an hour once we are there. Finally, our engineers start the car. Our engineers check it runs correctly on new diesel before we go. Lasting damage is very rare when it's noticed early, and the whole job is done where the vehicle is. Payment comes on the day, never upfront. For your insurer, there is a VAT invoice and a report from the engineer. Plenty of insurance policies cover misfuelling, and so look at yours as we head over. ## About Hopkinstown itself Hopkinstown is a suburban area in Rhondda Cynon Taf, situated on the riverside at an elevation of around 70 metres. Hopkinstown is located near the communities of Troedrhiw-Trwyn, Pantygraig Wen, and Penygraigwen, and is approximately 11.8 miles from Cardiff. Hopkinstown has a population of around 2230 people, predominantly living in terraced housing. ## AdBlue drains across Rhondda Cynon Taf, Hopkinstown included Pantygraig Wen and Penygraigwen get the identical vans as Hopkinstown, a residential suburb, along with other towns over CF postcodes. A postcode starting CF37 2 is the quickest way to tell us where you are. Centre of Hopkinstown or a layby near Coedcae Berwerdy: either way it sits, your vehicle doesn't need to move at all for this drain. The drain happens on the spot. Assuming won't help near Trehafod Community Village Hall, on a border or somewhere awkward to pin down; ring and ask. ## Your scenario, summed up Not run yet: keep the car off then ring. Already run: stop, switch off and ring. Either way, Petrol in Diesel takes it from there in Hopkinstown and anywhere around Rhondda Cynon Taf on 0333 366 0103.