Atlantis 10,000 Litre Twin Neck Non-Potable Underground Water Tank
£3,252.15 Exc VAT (£3,902.58 Inc VAT)
Shipping 15 – 20 Working Days
Delivery cost depends on location, access and unloading requirements.
Request A Delivery Quote
Some tanks require a personalised delivery quote due to size, location and access requirements.
Product Description
Atlantis 10,000 Litre Twin Neck Non-Potable Underground Water Tank
The Atlantis 10,000 Litre Twin Neck Non-Potable Underground Water Tank is a durable, space-saving solution for storing non-drinking water below ground while providing enhanced access through its twin neck design. Manufactured in the UK from high-quality rotationally moulded polyethylene, this underground water tank is ideal for domestic, commercial and agricultural applications where reliable non-potable water storage is required.
Perfect for rainwater harvesting, irrigation systems, washdown applications and storing water collected from wells or springs, the tank helps reduce mains water consumption while keeping outdoor spaces clear and uncluttered. The twin neck configuration provides improved access for maintenance, inspection and the installation of pumps or associated equipment, making it particularly well suited to larger rainwater harvesting systems.
Its robust ribbed construction delivers exceptional structural strength and, in many standard installations, allows the use of an environmentally friendly pea gravel backfill, helping to eliminate the need for costly concrete encasement. The shallow dig design makes installation quicker and easier than many traditional underground water tanks, while also making it suitable for areas with higher water tables.
The smooth curved base directs water towards submersible pumps, improving water recovery and helping to minimise the amount of water left inside the tank. Manufactured in the UK and backed by a 10-Year Manufacturer’s Warranty, the Atlantis 10,000 Litre Twin Neck Non-Potable Underground Water Tank offers a reliable, long-lasting solution for underground water storage and rainwater harvesting.
Key Features
- 10,000 Litre capacity
- Twin neck design for improved access and easier maintenance
- Suitable for non-potable water storage
- Ideal for rainwater harvesting and water reuse systems
- Strong ribbed design for exceptional structural strength
- Curved base improves pump efficiency and maximises water recovery
- Shallow dig design for easier installation
- Manufactured from seamless rotationally moulded polyethylene
- Designed for pea gravel backfill in many standard installations
- Twin 600mm access points for improved access
- Corrosion-resistant, maintenance-free construction
- Manufactured in the UK
- Backed by a 10-Year Manufacturer’s Warranty
Optional Extras
- Telescopic Neck – Extends the existing turret by approximately 300mm to 800mm for deeper installations.
- Pedestrian Lid Cover – Suitable for installations accessed by foot traffic only.
- Vehicle Rated Lid Cover – Designed for installations beneath driveways and areas subject to vehicle traffic.
- Calmed Inlet Drainage Pack – Filters incoming rainwater while reducing turbulence inside the tank, helping to improve water quality and minimise sediment disturbance.
- 110mm Backflow Non-Return Valve – Prevents flood water from flowing back into the tank during periods of heavy rainfall.
Product Specification
| Weight | 466 kg |
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| Dimensions | L 4810 x W 2710 x H 1725 mm |
| Manufacturer |
Delivery and Returns
Delivery Information
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:
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Scottish Highlands and Islands
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Isle of Wight, Channel Islands, Isle of Man, Anglesey, Western Isles, Shetland Islands, Orkney Islands, Isles of Scilly
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Northern Ireland
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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
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Refer to individual product pages for expected delivery times.
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Custom orders may take longer; please enquire before ordering.
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Items on the same order may be delivered separately due to stock locations.
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If delivery is delayed, we will notify you via email.
Delivery Method
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All deliveries are kerbside unless stated otherwise.
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For larger items, customer offloading may be required.
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Someone must be available to receive and inspect the goods.
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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:
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Contact us within 48 hours of delivery at [email protected]
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Provide:
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Order number
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Photos of the goods
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Brief description of the issue
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We may require images for the manufacturer to provide replacements.
Delivery Charges & Returns
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Ensure the product is the correct size and suitable for your intended use.
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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.
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Failed delivery attempts: After one unsuccessful delivery attempt, items will be returned to the depot, and redelivery charges may apply.
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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.
Returns & Refunds
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.