Online Tank Store Ltd

25/03/2026

Avoiding Cracked Water Tanks: A Quick Note On Fittings

If you’ve spent any time researching water tank installs for campervan builds, you’ve probably come across a wide mix of advice on fittings – especially around threaded connections.

One thing we’ve noticed popping up more frequently is the recommendation to use tapered thread fittings directly in plastic water tanks. Please do not do this! It might seem like a snug, leak-proof solution at first, but it will cause problems. All our standard water tank outlets are parallel thread and tapered fittings are not compatible.

We have written a brief explanation here for more information.

As always, get in touch and we will be more than happy to talk through compatible fittings.

If you’ve spent any time researching water tank installs for campervan builds, you’ve probably come across a wide mix of advice on fittings – especially around threaded connections.

24/02/2026

Step-by-step guide on how to install a tap on a water tank by the Online Tank Store team.

Learn how to install a tap on a water tank or water butt safely using our simple step-by-step guide, including correct PTFE tape application and leak prevention tips💧

Step-by-step guide on how to install a tap on a water tank correctly. Avoid leaks, apply PTFE tape properly, and achieve a watertight seal.

19/08/2025

I promise we are here somewhere...!

Our large water tanks are fully stocked again although they won't be in stock for long.

10,000 Litres
5,000 Litres
2,500 Litres
1,250 Litres

Come and find us (if you can).

18/08/2025

🚐JUST RELEASED: 89 Litre Underslung Water Tank for Mercedes Sprinter.

The wait is over! The underslung water tank built specifically for the Mercedes Sprinter is finally here — and it's ready to ship.
Perfect for van conversions, this tank mounts underneath your Sprinter to save precious interior space while keeping your water supply secure and road-ready.

💧 Direct fit for Sprinter chassis
💧 Tough + adventure-ready
💧 Easy install

The tank is vehicle specific and fits the Mercedes Sprinter 2006 onwards in L2, L3, L4 Version in Front Wheel Drive and Rear Wheel Drive. This tank suits right-hand vehicles only.
It also fits the VW Crafter 2006 – 2017. MWB, LWB and XLWB Version in Front Wheel Drive and Rear Wheel Drive. This tank suits right-hand vehicles only.

Stock is limited on this first run — grab yours before they’re gone!
👉https://www.onlinetankstore.co.uk/product/89-litre-sprinter-underslung-water-tank/

Shipping 3 – 5 Working Days UK Mainland Delivery From £26.50

30/07/2025

What makes Enduramaxx Water Tanks so popular? We have written about it here> https://www.onlinetankstore.co.uk/blog/what-water-storage-tank-do-i-need/why-choose-an-enduramaxx-water-tank-the-smart-storage-solution-from-online-tank-store/

When it comes to durable, reliable, and versatile water storage, the Enduramaxx Water Tank stands out as a trusted choice across the UK. Whether you need a solution for rainwater harvesting, agricultural irrigation, industrial use, or domestic water storage, Enduramaxx delivers high-quality, UK-manu...

28/07/2025

Not all Water Butts are made equal...

23/07/2025

Our latest article on Baffled Water Tanks and why they are needed for transporting large volumes of water.

When you’re in the business of window cleaning or mobile water transportation, you quickly learn that not all water tanks are created equal. One type stands out for its safety, stability, and practicality — the baffled water tank.

17/07/2025

🚛💨 No Lead Times. No Waiting. Just Fast Delivery. 💨🚛

At Online Tank Store, we don’t just talk about fast service — we deliver it. Literally.

Just yesterday, we took an order at 4:30 PM… and had the tank delivered to the customer by 8:30 AM the very next morning. 💪⏱️
This was a 1150 Litre Slimline Fire Protected Oil Tank by Tuffa Tanks - just one of the tanks we have ready to go.

How? Simple:
✅ We hold stock
✅ No lead times
✅ Ready when you are

Need a tank urgently? You can count on us to have what you need, when you need it — no delays, no excuses.

03/07/2025

The Farming, Equipment & Technology Fund 2025 is currently open, with the opportunity to claim up to £1694 for a towed Water Bowser with Integrated Trough. However, applications close at midday on the 10th July 2025.

Looking for a high-quality, UK-manufactured bowser that fits the bill? Look no further;

https://www.onlinetankstore.co.uk/product/2000-litre-animal-water-bowser-with-trough-site-tow/

For more information on the grant, see below link;

https://www.gov.uk/government/publications/farming-equipment-and-technology-fund-2025/productivity-items-and-specifications-farming-equipment-and-technology-fund-fetf-2025

Shipping 1 – 2 Working Weeks Delivery price on application.

23/06/2025

🚨 In Stock Now: Large Water Tanks! 🚨

☀️ At Online Tank Store, we’ve got a wide range of large water tanks in stock and ready to go — no long waits, no surprises.

Our latest delivery of Enduramaxx stock has been in demand. With Festivals and summer events now in full swing, the need for water is critical and our stock has been invaluable to many of our customers.

🛑 Summer often brings extended lead times across the industry, but with our in-stock tanks, you can avoid the delays and get what you need when you need it.

✅ Fast dispatch/same day collection available
✅ Reliable stock availability
✅ Peace of mind for festivals and events, farms, gardens, and commercial use

📦 Don’t get caught short this summer — secure your tank today at onlinetankstore.co.uk 💧

26/03/2025

Help please!🔧 We are on the lookout for more Oil Tank Installers to support the installation of Oil Tanks for our local customers (Dorset, Devon and Somerset).

We are looking for Certified Installers that we can add to our Preferred Suppliers list, come highly recommended and would carry out the installation with the upmost customer service.

If you are interested in being added to our list, please email [email protected] or contact us through Facebook with your business details.

Please share if you can😀