SlimlineBunded Oil Tanks

Slimline tanks have a narrower footprint than standard bunded models, making them suited to tight side passages, narrow garden strips or restricted access points where a wider tank simply won't fit. They still provide full double-skin bunding — an inner tank holding the oil and an outer skin (bund) that contains at least 110% of that capacity in case of a leak. Capacity is generally lower for a given footprint, so it's worth checking usage against tank volume before ordering.

Sizing depends on your annual oil consumption and how often you're happy to order deliveries — most domestic properties run comfortably on tanks between 1,200 and 2,500 litres. Larger households, or those wanting to buy in bulk when prices are favourable, often opt towards the top of that range. As a rough guide, work out your typical annual usage and aim for a tank that covers at least one to two deliveries' worth of oil.

Yes — oil tank installations must comply with OFTEC standard OFS T100 and relevant building regulations, particularly around fire separation distances from boundaries, buildings and openings. In England and Wales this typically falls under Building Regulations Part J, and installation should be carried out or signed off by a competent, registered installer. Getting this wrong can invalidate insurance and cause issues at property sale, so it's not a step to skip.

The tank needs a firm, level, non-combustible base able to support its full weight when completely filled — typically a concrete slab or paving slabs on a compacted, well-drained sub-base. The base must extend at least 300mm beyond the tank's footprint on all sides, and manufacturer guidance should always be checked as minimum thickness requirements vary by tank weight. Avoid decking, gravel alone, or anything that could shift or burn.

Many slimline bunded tanks are suitable for both kerosene (heating oil) and diesel, but this depends on the specific tank's construction and fittings, so always check the product specification before ordering. If you're storing diesel for vehicles or plant, you may also need additional metering or dispensing equipment, and different site rules can apply for commercial fuel storage. When in doubt, confirm intended use with us before purchase so we can point you to the right tank.

Slimline tanks are bulky, awkward items, so check delivery vehicle access to your property, particularly for narrow driveways or gated side entrances where the tank is actually needed. Kerbside delivery is standard, and moving the tank to its final position is usually the customer's or installer's responsibility, so plan manpower or plant accordingly. It's also worth having the base fully prepared and cured before the tank arrives to avoid delays.