Enduramaxx: Water Tanks for UK Households

Enduramaxx is a British maker of plastic water tanks, manufactured at its own factory in Lincolnshire and sold direct¹. For a household, the range covers three practical jobs: storing drinking water safely, capturing rainwater for the garden and washing, and holding larger volumes where a property has the space. The range runs from a 150 litre potable drinking water tank up to a 100,000 litre rainwater harvesting tank².

If you are buying for preparedness rather than for a building project, the decision comes down to two questions. Do you need the water to be drinkable? If so, choose a tank made from WRAS approved polymer, which the maker uses across its potable and open-top ranges³. If the water is for the garden, the car or the toilet, a rainwater harvesting tank or water butt does the job at a fraction of the volume¹. Then decide how it arrives: most tanks are stocked for collection or fast delivery throughout the UK, and where you cannot offload one yourself, Enduramaxx offers Hiab delivery priced on request⁵.

This page sets out what each type of tank does, where it is made, how delivery works and what to check before you order. For the wider picture on storing water at home, start with Water in an Emergency: A Household Guide.

What Enduramaxx makes for UK households

Enduramaxx's range divides into four household groups. Potable drinking water tanks store water fit for drinking, made from WRAS approved polymer and available in vertical and slimline shapes⁷. Rainwater harvesting tanks collect roof run-off, above ground or underground, and feed garden watering, washing and toilet flushing¹. Water butts and open-top tanks hold water for the garden and for wash-down, without the need for a sealed, pressurised system⁹. Baffled and flat tanks are shaped for vehicles and tight spaces, and the maker lists uses from camper vans to car valeting¹⁰.

The maker describes its slimline tanks as suitable for rainwater harvesting under decking, garden watering, irrigation, loft header tanks, potable water, chemical dosing, car valeting, window cleaning, trailer tanks, water bowsers, food grade use and camper or motorhome tanks⁷. That breadth is the point: the same moulding serves a household storing a few hundred litres against a supply interruption and a business that needs water on the road.

WRAS approved polymer drinking water tanks

WRAS stands for the Water Regulations Advisory Scheme, and a tank made from WRAS approved polymer is intended for the storage of drinking or potable water⁷. Enduramaxx uses this material across its potable range, from the 150 litre vertical tank up to the 15,000 litre model¹¹. The 2,000 litre tank is made from MDPE, medium density polyethene, UV stabilised for many years of outside use¹⁴. Colours are black, natural and blue³.

For a household, the practical questions are size, siting and fittings. A 1,000 or 1,050 litre vertical tank suits a garage, outbuilding or sheltered corner; the 3,000 litre and larger models need a firm, level base and room to work around them¹². Enduramaxx offers a set of fittings that decide how usable the tank is day to day: liquid level sensor assemblies, fill pipes, PN16 and ANSI flanged connections, welded BSP outlets and sockets, and a bolt down lid with side access hatch¹⁷. The maker states that the lid and hatch give access for cleaning, installation and maintenance of water pumps¹⁷.

Slimline versions fit where floor space is short, and the maker lists potable water among their uses⁷. If drinking water storage is your main reason for buying, size it against your household rather than the space available: a tank you can fill, draw from and clean is more use than a larger one you cannot maintain.

Rainwater harvesting tanks, including underground models

Rainwater harvesting tanks provide the storage element of a rainwater system, and Enduramaxx makes them as vertical above-ground tanks or as underground tanks¹. The maker describes them as designed for both domestic and commercial applications, with above and underground tanks fitted with a pump and filter able to provide water supplies through dry spring and summer months¹. Commercial uses include harvesting from commercial and industrial buildings and greywater systems for flushing toilets¹.

The 1,250 litre and 3,500 litre models are described as providing rainwater or grey water storage for a rainwater harvesting system¹⁹. The 3,000 litre tank also lists seawater storage for aquariums and sea life centres among its uses, which tells you the moulding is sealed and robust²¹.

Underground models suit a garden where above-ground space is tight or where you want the storage out of sight. The 150 litre underground tank is listed for rainwater harvesting and manufactured in the UK⁸. The 1,400 litre flat base underground tank is described as designed for use in industrial, agricultural, commercial and domestic schemes, and is made from WRAS approved polymer¹⁰. A buried tank needs an excavation, a base and a route for pipework, so plan the installation before the tank arrives.

Water butts and waste water tanks

Not every job needs a sealed, potable tank. The 300 litre non-potable vertical tank lists irrigation and wash-down facilities among its uses¹. The 1,000 litre baffled flat tank can be used as a rainwater tank, a water butt for garden watering and for rainwater harvesting, and its typical uses include catering vans, camper vans and caravans, window cleaners' tanks, mobile pet grooming, sprayer tanks, mobile bin cleaning, mobile car valeters and mobile caterers².

That list is worth reading closely if you keep water in a vehicle. A baffled tank is shaped to reduce the movement of water in transit, which matters for handling and for the vehicle's behaviour on the road. The same tank is made from WRAS approved polymer, so it can serve as a potable water tank as well¹.

Open-top tanks are not the right choice for drinking water. Keep them covered where you can, and use them for the jobs the maker lists.

Where Enduramaxx tanks are made: a factory in Lincolnshire

Enduramaxx manufactures its tanks at its own factory in Lincolnshire⁷. The maker repeats this across product pages: drinking water tanks are manufactured at the factory in Lincolnshire, and the open-top tanks are manufactured by Enduramaxx at the same site¹⁸. The 150 litre underground tank and the 1,400 litre flat base underground tank are both listed as manufactured in the UK⁸.

For a household, UK manufacture matters for two reasons. First, replacement parts and fittings come from the same maker that moulded the tank, so a lost lid or a damaged outlet is a conversation with one company rather than a search. Second, delivery distances are short: the maker states that most of its tanks are stocked for collection or fast delivery throughout the UK, including its underground rainwater harvesting range⁵.

The 25,000 litre open-top tank carries a 10-year guarantee, as listed by the maker⁶. Guarantee terms vary by product, so check the terms for the model you are considering rather than assuming they apply across the range.

Stocked tanks: collection or fast delivery throughout the UK

Most Enduramaxx water tanks are stocked for collection or fast delivery throughout the UK⁵. The maker repeats this on individual product pages across the rainwater range, from the 500 litre tank to the 120,000 litre model²³. The 300 litre non-potable tank page puts it more broadly: most plastic tanks, underground water tanks and rainwater tanks are stocked for collection or quick delivery throughout the UK⁹.

Not everything is held as standard stock. The 150 litre underground tank is listed as available from August 2025, which tells you that model has a lead time rather than sitting on a shelf⁸. If your plans depend on a delivery date, confirm stock for the exact model before you commit to an installation.

Collection from the factory is the other route. If you collect, match the vehicle to the tank: a 1,000 litre tank holds a tonne of water once filled, so the journey home is the moment to think about weight and restraint, not the moment after.

Hiab delivery if you can't offload the tank

A large tank arriving on a lorry is a problem if you have no forklift and no way to lift it. Enduramaxx offers Hiab deliveries, where a lorry-mounted crane lifts the tank into position, in cases where the customer cannot offload it, and prices them on request¹. The option is listed on individual product pages across the range, including the 300 litre non-potable tank and the 12,500 litre rainwater tank³.

Ask for a Hiab quote when you order, and describe the site honestly. The crane needs to reach the tank position, so gates, overhead cables, slopes, soft ground and distance from the road all matter. A tank that cannot be reached is a tank that gets left at the kerb.

Direct to site delivery for installers

Enduramaxx delivers direct to site for installers, which the maker describes as saving the double handling of tanks². The logic is simple: a tank that goes from factory to site avoids being unloaded at a merchant or a yard and lifted again. For a household having work done, that means asking your installer to order the tank to arrive when the groundworks are ready, rather than storing it in the garden for weeks.

The same delivery options apply across the range: collection or quick delivery throughout the UK, direct to site for installers, and Hiab delivery priced on request where the tank cannot be offloaded²⁷. If you are managing the project yourself, agree with the installer who is responsible for offloading before the lorry arrives.

Support, warranty and safety

Enduramaxx sells direct, and each product page sets out the tank's specification, fittings and delivery options, which is the place to start with a question about a specific model¹. For Hiab quotes and stock checks, contact the maker before ordering rather than after.

On safety, the maker's own instructions govern the product: use potable tanks for drinking water and open-top tanks for the jobs listed, and fit the bolt down lid and side access hatch where you need access for cleaning and pump maintenance¹. For the wider household picture on storing and treating water, see Water in an Emergency: A Household Guide and Self-Reliance at Home. If a flood is the reason you are buying storage, read Flooding: A Household Guide first.