Atlantis Cascade Rainwater Harvesting Kit

£747.00 Exc VAT (£896.40 Inc VAT)

To be sold with the Atlantis Underground Tanks only.

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Product Description

Atlantis Cascade  Rainwater Harvesting Kit

The Atlantis Cascade Underground Rainwater Harvesting Kit is a complete rainwater collection and reuse solution designed to help homeowners, landscapers and small commercial sites make the most of harvested rainwater. Suitable for use with compatible Atlantis underground water tanks (sold separately), this kit provides everything required to create an efficient underground rainwater harvesting system for irrigation and other non-potable water applications.

Designed to maximise water quality and system reliability, the Cascade kit incorporates a high-performance filtration system, calmed inlet, floating intake and stainless steel submersible pump. Together, these components help ensure cleaner stored water, reliable water delivery and reduced maintenance compared with basic rainwater collection systems.

Ideal for supplying water to garden taps, irrigation systems and outdoor cleaning tasks, the Atlantis Cascade system offers an environmentally friendly way to reduce mains water consumption while lowering water bills.

Key Features

  • Complete underground rainwater harvesting kit
  • Designed for use with Atlantis underground water tanks
  • High-quality stainless steel submersible pump
  • Self-cleaning filter helps improve water quality
  • Floating intake draws cleaner water from below the surface
  • Calmed inlet reduces disturbance of settled sediment
  • Suitable for domestic and light commercial applications
  • Easy pump maintenance with integrated lifting chain

What’s Included?

B Series Stainless Steel Pump & Float Switch

The B Series submersible pump provides reliable water delivery for a wide range of rainwater harvesting applications. Manufactured from stainless steel for durability, it is suitable for garden irrigation, outdoor water supplies and water transfer. The included float switch automatically protects the pump by preventing dry running.

Self-Cleaning Patronen Filter

The integrated Patronen Filter removes leaves, debris and other contaminants before rainwater enters the storage tank. Its smooth internal design encourages debris to wash through to the overflow while the stainless steel filter cartridge helps maintain excellent filtration with minimal maintenance.

Calmed Inlet

The calmed inlet gently disperses incoming rainwater beneath the water surface, preventing disturbance of settled sediment at the bottom of the tank. This helps maintain better overall water quality and reduces unnecessary contamination.

Floating Intake

Rather than drawing water from the very top or bottom of the tank, the floating intake collects water from the cleanest area below the surface. This helps minimise sediment and surface contaminants entering the pump and downstream equipment.

Pump Turret

The flexible pump turret provides a secure connection between the submersible pump and the external pipework, making installation straightforward while accommodating pressurised water flow.

Pump Lifting Chain

A durable lifting chain is supplied to allow the pump to be safely raised for servicing or maintenance without entering the tank.

Rodent Guard

The rodent guard fits to the overflow to help prevent rodents, insects and larger debris entering the underground storage tank, helping to protect stored rainwater from contamination.

Common Applications

  • Garden irrigation
  • Lawn and landscape watering
  • Vegetable gardens and allotments
  • Outside taps
  • Car washing
  • Window cleaning
  • Patio and driveway pressure washing
  • Bowling greens
  • Parks and landscaped communal areas
  • Small commercial irrigation systems

Additional Information

  • Compatible with Atlantis underground water tanks
  • Underground tank sold separately
  • Delivery hose options available
  • Suitable for non-potable (non-drinking) water applications
  • Designed for domestic and light commercial use
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

Atlantis Cascade  Rainwater Harvesting Kit

The Atlantis Cascade Underground Rainwater Harvesting Kit is a complete rainwater collection and reuse solution designed to help homeowners, landscapers and small commercial sites make the most of harvested rainwater. Suitable for use with compatible Atlantis underground water tanks (sold separately), this kit provides everything required to create an efficient underground rainwater harvesting system for irrigation and other non-potable water applications.

Designed to maximise water quality and system reliability, the Cascade kit incorporates a high-performance filtration system, calmed inlet, floating intake and stainless steel submersible pump. Together, these components help ensure cleaner stored water, reliable water delivery and reduced maintenance compared with basic rainwater collection systems.

Ideal for supplying water to garden taps, irrigation systems and outdoor cleaning tasks, the Atlantis Cascade system offers an environmentally friendly way to reduce mains water consumption while lowering water bills.

Key Features

  • Complete underground rainwater harvesting kit
  • Designed for use with Atlantis underground water tanks
  • High-quality stainless steel submersible pump
  • Self-cleaning filter helps improve water quality
  • Floating intake draws cleaner water from below the surface
  • Calmed inlet reduces disturbance of settled sediment
  • Suitable for domestic and light commercial applications
  • Easy pump maintenance with integrated lifting chain

What’s Included?

B Series Stainless Steel Pump & Float Switch

The B Series submersible pump provides reliable water delivery for a wide range of rainwater harvesting applications. Manufactured from stainless steel for durability, it is suitable for garden irrigation, outdoor water supplies and water transfer. The included float switch automatically protects the pump by preventing dry running.

Self-Cleaning Patronen Filter

The integrated Patronen Filter removes leaves, debris and other contaminants before rainwater enters the storage tank. Its smooth internal design encourages debris to wash through to the overflow while the stainless steel filter cartridge helps maintain excellent filtration with minimal maintenance.

Calmed Inlet

The calmed inlet gently disperses incoming rainwater beneath the water surface, preventing disturbance of settled sediment at the bottom of the tank. This helps maintain better overall water quality and reduces unnecessary contamination.

Floating Intake

Rather than drawing water from the very top or bottom of the tank, the floating intake collects water from the cleanest area below the surface. This helps minimise sediment and surface contaminants entering the pump and downstream equipment.

Pump Turret

The flexible pump turret provides a secure connection between the submersible pump and the external pipework, making installation straightforward while accommodating pressurised water flow.

Pump Lifting Chain

A durable lifting chain is supplied to allow the pump to be safely raised for servicing or maintenance without entering the tank.

Rodent Guard

The rodent guard fits to the overflow to help prevent rodents, insects and larger debris entering the underground storage tank, helping to protect stored rainwater from contamination.

Common Applications

  • Garden irrigation
  • Lawn and landscape watering
  • Vegetable gardens and allotments
  • Outside taps
  • Car washing
  • Window cleaning
  • Patio and driveway pressure washing
  • Bowling greens
  • Parks and landscaped communal areas
  • Small commercial irrigation systems

Additional Information

  • Compatible with Atlantis underground water tanks
  • Underground tank sold separately
  • Delivery hose options available
  • Suitable for non-potable (non-drinking) water applications
  • Designed for domestic and light commercial use
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.