Harlequin 3500 Litre Bunded Oil Tank

£3,374.00 Exc VAT

(£4048.80 Inc VAT)

Shipping 3 – 5 Working Days
Free UK Mainland Delivery

✓ Free UK Delivery
✓ OFTEC Compliant
✓ Slimline Design for Narrow Access
✓ 10 Year Warranty
✓ HVO Compatible
✓ Bluetooth Smart Fuel Monitoring

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Product Description

Harlequin 3500 Litre Bunded Oil Tank

The 3500 Litre Environmentally Friendly Bunded Oil Tank is designed for the safe and compliant storage of heating oil in both domestic and commercial installations. Manufactured from high-quality Medium Density Polyethylene (MDPE), this durable bunded oil tank is lightweight, non-corrosive, UV stabilised and built to provide long-lasting performance in a wide range of environments.

Supplied with a range of essential fittings, including an ultrasonic contents gauge and bottom outlet fitting kit, this 3500 litre heating oil tank provides a complete storage solution for professional and residential applications. Its bottom outlet design allows for efficient fuel supply and straightforward installation.

The integrally bunded design features a “tank within a tank”, offering an additional layer of environmental protection in the event of an internal tank failure or leak. This helps prevent oil contamination and ensures compliance with current oil storage regulations, making it ideal for properties requiring secure and environmentally responsible fuel storage.

Suitable for domestic heating oil, commercial fuel storage and agricultural applications, this 3500 litre bunded oil tank combines reliability, safety and modern styling in one practical solution.

Key Features

  • Integrally bunded (double-skinned construction)
  • Dimensions: L 2450 x W 1770 x H 1890 mm
  • 3500 litre capacity
  • Harlequin Smart Gauge with app-connected fuel monitoring – included
  • 2″ BSP fill point (standard for fuel deliveries)
  • Inner tank vent
  • 16″ lockable access lid
  • 4″ lockable inspection cap
  • Bottom 1″ BSP Female outlet – Standard bottom outlet fitting kit supplied for straightforward pipework connection
  • Manufactured from durable MDPE
  • 10-year manufacturer’s warranty (upon registration)

Installation Requirements

This tank must be installed on a flat, level and non-combustible base that is capable of supporting the tank at full capacity. The base must extend fully beneath the tank footprint and provide continuous support across the entire underside.

Minimum Base Dimensions:

  • Length: 3050mm
  • Width: 2370mm

Installation must comply with current building regulations and applicable oil storage guidelines.

Product Specification
Weight 265 kg
Dimensions L 2450 x W 1770 x H 1890 mm
Manufacturer

Capacity

Bunded

Yes

Delivery and Returns

Shipping costs for standard postcodes within UK Mainland are calculated at checkout when a postcode is entered.

Delivery charges are based on current manufacturer and courier rates. In some cases, delivery costs may be subject to confirmation after an order has been placed due to supplier delivery zones or freight changes. If an additional delivery charge applies, the customer will be notified before the order is dispatched and given the option to proceed or cancel the order for a full refund.

Some areas may incur additional charges, including:

  • Scottish Highlands and Islands

  • Isle of Wight, Channel Islands, Isle of Man, Anglesey, Western Isles, Shetland Islands, Orkney Islands, Isles of Scilly

  • Northern Ireland

  • Republic of Ireland

Additional charges may apply for postcodes in these areas:
AB, BT, CA, CT, DD, DG, EH, FK, G, GY, IM, IV, JE, KA, KW, KY, LD, LL, ML, PA, PH, PO 30–41, SA, SY, TD, TN, TR, ZE

If your postcode is listed above, please contact us before ordering for a shipping quote.

Some products are only available for delivery within England & Wales; this will be stated on the product page. If you are outside this area, please contact us for a quotation.


Delivery Lead Times

  • Refer to individual product pages for expected delivery times.

  • Custom orders may take longer; please enquire before ordering.

  • Items on the same order may be delivered separately due to stock locations.

  • If delivery is delayed, we will notify you via email.


Delivery Method

  • All deliveries are kerbside unless stated otherwise.

  • For larger items, customer offloading may be required.

  • Someone must be available to receive and inspect the goods.

  • Goods may be left in a safe place at the customer’s risk; Online Tank Store cannot accept responsibility once goods are left.

Note: By signing for the goods, you confirm that the outer packaging is intact and free from visible damage. Any visible damage must be noted on the delivery paperwork or the delivery refused.

Scheduled delivery times may be accommodated; please add instructions in the Customer Notes section at checkout.


Missing or Faulty Items

If items are missing or arrive damaged:

  1. Contact us within 48 hours of delivery at [email protected]

  2. Provide:

    • Order number

    • Photos of the goods

    • Brief description of the issue

We may require images for the manufacturer to provide replacements.


Delivery Charges & Returns

  • Ensure the product is the correct size and suitable for your intended use.

  • Standard tanks (no customisation) are returnable but subject to a restocking charge and must be returned in A1 condition. Returns may be expensive due to size and weight; please check before ordering.

  • Failed delivery attempts: After one unsuccessful delivery attempt, items will be returned to the depot, and redelivery charges may apply.

  • Special or custom tanks are non-returnable. If the wrong product is ordered or the item is no longer required, it cannot be returned, and no refund will be issued.

Our full returns and refund policy can be found by clicking here.

It is important to us that the items you order are correct for your needs however, we understand that situations and requirements can change. It can be costly to return an order so please ensure you are certain of your requirements before you order and that you have read the returns policy above for details.

Custom Tank – An order is considered ‘custom’ when a non-standard configuration or colour is requested. Custom orders are not eligible for return so please ensure the product is what you require before ordering. By purchasing, you are agreeing to the above terms.

Product Description

Harlequin 3500 Litre Bunded Oil Tank

The 3500 Litre Environmentally Friendly Bunded Oil Tank is designed for the safe and compliant storage of heating oil in both domestic and commercial installations. Manufactured from high-quality Medium Density Polyethylene (MDPE), this durable bunded oil tank is lightweight, non-corrosive, UV stabilised and built to provide long-lasting performance in a wide range of environments.

Supplied with a range of essential fittings, including an ultrasonic contents gauge and bottom outlet fitting kit, this 3500 litre heating oil tank provides a complete storage solution for professional and residential applications. Its bottom outlet design allows for efficient fuel supply and straightforward installation.

The integrally bunded design features a “tank within a tank”, offering an additional layer of environmental protection in the event of an internal tank failure or leak. This helps prevent oil contamination and ensures compliance with current oil storage regulations, making it ideal for properties requiring secure and environmentally responsible fuel storage.

Suitable for domestic heating oil, commercial fuel storage and agricultural applications, this 3500 litre bunded oil tank combines reliability, safety and modern styling in one practical solution.

Key Features

  • Integrally bunded (double-skinned construction)
  • Dimensions: L 2450 x W 1770 x H 1890 mm
  • 3500 litre capacity
  • Harlequin Smart Gauge with app-connected fuel monitoring – included
  • 2″ BSP fill point (standard for fuel deliveries)
  • Inner tank vent
  • 16″ lockable access lid
  • 4″ lockable inspection cap
  • Bottom 1″ BSP Female outlet – Standard bottom outlet fitting kit supplied for straightforward pipework connection
  • Manufactured from durable MDPE
  • 10-year manufacturer’s warranty (upon registration)

Installation Requirements

This tank must be installed on a flat, level and non-combustible base that is capable of supporting the tank at full capacity. The base must extend fully beneath the tank footprint and provide continuous support across the entire underside.

Minimum Base Dimensions:

  • Length: 3050mm
  • Width: 2370mm

Installation must comply with current building regulations and applicable oil storage guidelines.

Product Specification
Weight 265 kg
Dimensions L 2450 x W 1770 x H 1890 mm
Manufacturer

Capacity

Bunded

Yes

Delivery and Returns

Shipping costs for standard postcodes within UK Mainland are calculated at checkout when a postcode is entered.

Delivery charges are based on current manufacturer and courier rates. In some cases, delivery costs may be subject to confirmation after an order has been placed due to supplier delivery zones or freight changes. If an additional delivery charge applies, the customer will be notified before the order is dispatched and given the option to proceed or cancel the order for a full refund.

Some areas may incur additional charges, including:

  • Scottish Highlands and Islands

  • Isle of Wight, Channel Islands, Isle of Man, Anglesey, Western Isles, Shetland Islands, Orkney Islands, Isles of Scilly

  • Northern Ireland

  • Republic of Ireland

Additional charges may apply for postcodes in these areas:
AB, BT, CA, CT, DD, DG, EH, FK, G, GY, IM, IV, JE, KA, KW, KY, LD, LL, ML, PA, PH, PO 30–41, SA, SY, TD, TN, TR, ZE

If your postcode is listed above, please contact us before ordering for a shipping quote.

Some products are only available for delivery within England & Wales; this will be stated on the product page. If you are outside this area, please contact us for a quotation.


Delivery Lead Times

  • Refer to individual product pages for expected delivery times.

  • Custom orders may take longer; please enquire before ordering.

  • Items on the same order may be delivered separately due to stock locations.

  • If delivery is delayed, we will notify you via email.


Delivery Method

  • All deliveries are kerbside unless stated otherwise.

  • For larger items, customer offloading may be required.

  • Someone must be available to receive and inspect the goods.

  • Goods may be left in a safe place at the customer’s risk; Online Tank Store cannot accept responsibility once goods are left.

Note: By signing for the goods, you confirm that the outer packaging is intact and free from visible damage. Any visible damage must be noted on the delivery paperwork or the delivery refused.

Scheduled delivery times may be accommodated; please add instructions in the Customer Notes section at checkout.


Missing or Faulty Items

If items are missing or arrive damaged:

  1. Contact us within 48 hours of delivery at [email protected]

  2. Provide:

    • Order number

    • Photos of the goods

    • Brief description of the issue

We may require images for the manufacturer to provide replacements.


Delivery Charges & Returns

  • Ensure the product is the correct size and suitable for your intended use.

  • Standard tanks (no customisation) are returnable but subject to a restocking charge and must be returned in A1 condition. Returns may be expensive due to size and weight; please check before ordering.

  • Failed delivery attempts: After one unsuccessful delivery attempt, items will be returned to the depot, and redelivery charges may apply.

  • Special or custom tanks are non-returnable. If the wrong product is ordered or the item is no longer required, it cannot be returned, and no refund will be issued.

Our full returns and refund policy can be found by clicking here.

It is important to us that the items you order are correct for your needs however, we understand that situations and requirements can change. It can be costly to return an order so please ensure you are certain of your requirements before you order and that you have read the returns policy above for details.

Custom Tank – An order is considered ‘custom’ when a non-standard configuration or colour is requested. Custom orders are not eligible for return so please ensure the product is what you require before ordering. By purchasing, you are agreeing to the above terms.