800L Rainwater System - plastic

800L Rainwater Tank System – 3P Technik Black Water Butt Kit

£759.00 Exc VAT

(£910.80 Inc VAT)

Shipping 2 – 5 Working Days 
FREE UK Mainland Delivery

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SKU: RTS800 Category:

Product Description

800L Rainwater Tank System – 3P Technik Black Water Butt Kit

The 800L 3P Technik Rainwater Harvesting System is a complete above-ground solution for collecting, storing and reusing rainwater at home or in the garden. As a result, it helps reduce mains water use while still giving you a reliable alternative water supply. It is ideal for gardeners, homeowners and small irrigation setups.

Supplied with a durable 800 litre black rainwater tank, the system includes all the essential components needed to create a practical and expandable rainwater harvesting setup. In addition, the modular design means you can increase storage later if needed.

Product Summary

  • 800 litre rainwater tank – ideal for garden and domestic water storage
  • Black tank finish helps reduce light penetration and limit algae growth
  • High-flow plastic tap for easy access to stored rainwater
  • Tank-to-tank connectors included for future system expansion
  • Black filter collector designed for standard UK downpipes
  • Steinbach submersible garden pump for water transfer and irrigation use
  • Tank connection kit for secure and straightforward installation
  • Water level gauge for monitoring stored rainwater levels

Pump Information

This system includes a steel submersible garden pump designed to deliver strong, reliable water pressure for a wide range of garden watering tasks.

  • 600W motor for powerful performance
  • Maximum flow rate of up to 3,000 litres per hour
  • Fully submersible and waterproof construction
  • 10 metre mains power cable for flexible positioning
  • Hosetail connector included for use with standard garden hoses and watering accessories
  • Lightweight design with carry handle for easy handling and storage

Connected at the base of the tank, the pump allows you to make full use of the stored rainwater, delivering efficient water transfer for irrigation, garden watering and general outdoor 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

800L Rainwater Tank System – 3P Technik Black Water Butt Kit

The 800L 3P Technik Rainwater Harvesting System is a complete above-ground solution for collecting, storing and reusing rainwater at home or in the garden. As a result, it helps reduce mains water use while still giving you a reliable alternative water supply. It is ideal for gardeners, homeowners and small irrigation setups.

Supplied with a durable 800 litre black rainwater tank, the system includes all the essential components needed to create a practical and expandable rainwater harvesting setup. In addition, the modular design means you can increase storage later if needed.

Product Summary

  • 800 litre rainwater tank – ideal for garden and domestic water storage
  • Black tank finish helps reduce light penetration and limit algae growth
  • High-flow plastic tap for easy access to stored rainwater
  • Tank-to-tank connectors included for future system expansion
  • Black filter collector designed for standard UK downpipes
  • Steinbach submersible garden pump for water transfer and irrigation use
  • Tank connection kit for secure and straightforward installation
  • Water level gauge for monitoring stored rainwater levels

Pump Information

This system includes a steel submersible garden pump designed to deliver strong, reliable water pressure for a wide range of garden watering tasks.

  • 600W motor for powerful performance
  • Maximum flow rate of up to 3,000 litres per hour
  • Fully submersible and waterproof construction
  • 10 metre mains power cable for flexible positioning
  • Hosetail connector included for use with standard garden hoses and watering accessories
  • Lightweight design with carry handle for easy handling and storage

Connected at the base of the tank, the pump allows you to make full use of the stored rainwater, delivering efficient water transfer for irrigation, garden watering and general outdoor 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.