Enduramaxx Rainwater Harvesting Kit B
Rainwater Harvesting Kit (B) - 450m² Roof Area - Image 2
Rainwater Harvesting Kit (B) - 450m² Roof Area - Image 3
Enduramaxx Rainwater Harvesting Kit B

Rainwater Harvesting Kit (B) – 450m² Roof Area

£375.00 Exc VAT (£450.00 Inc VAT)

Shipping 1 – 2 Working Days
UK Mainland Delivery From £10.00

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Product Description

Rainwater Harvesting Kit (B) – 450m² Roof Area – the ideal accompaniment to the Enduramaxx Rainwater Harvesting Water Tank range. The rainwater filter system is designed for roof spaces up to a maximum of 450m² (per kit) and contains the following;

  • Combi filter unit with lid
  • Siphon overflow tube
  • Calmed inlet (pipe to go from the bottom of the filter to the bottom of the tank)

Water is equally distributed across the cascade where cleaning occurs, with the largest dirt particles forced across the primary filter cascade directly to the sewer.

Next, pre-filtered water then flows over the secondary filter sieve (mesh size 0.65 mm) where the mesh structure washes any remaining dirt into the sewer. Cleaned water flows into the tank via a calmed inlet, designed to undertake a secondary cleaning step by allowing the water to enter the tank with minimal turbulence. This ensures it does not disturb any sediment which may be present at the bottom of the tank.

Calmed rainwater entering the tank supplies oxygen to the water resting at the lower end of the tank, keeping it fresh by prevention of anaerobic decomposition. Finally the overflow siphon, which incorporates a skimming inlet, skims the surface water inside of the storage tank. This removes further debris, oils and other floating contaminants thereby increasing the quality of the stored water.

The filter kit is suitable for garden watering as well as a large range of other uses and helps to retain as much collected water as possible, whilst providing an efficient filtration system and regular replenishment of stored water.

  • Suitable for 110 mm (4”) downpipes
  • Filter unit weight 6.2 kg

Key Benefits

  • Designed for roof sizes up to a maximum of 450 sq metres (per kit)
  • Two step cleaning system independent of flow rate ensuring high filtering efficiency
  • Filter cartridge location assists continuous removal of dirt
  • Frost resistant
  • Self-Cleaning and low maintenance
  • Filter insert easily removable for cleaning
  • Suitable for 110 mm (4”) downpipes
  • Filter unit weight 6.2 kg
  • Siphon overflow with skimming inlet
  • Siphon overflow pipe to fit a 130 mm hole in storage tank wall
  • Calmed inlet to prevent incoming water disturbing any sediment in tank
  • Calmed inlet also ensures fresh water is supplied to lower area of the tank resulting in complete and regular replenishment of stored water
  • Wall bracket not included.

Note – it is recommended that the filter be cleaned several times a year dependant on how much rainfall there is. Refer to installation instructions for guidance on correct fitting.

Product Specification
Weight 6.2 kg
Product Specific Information

Rainwater Harvesting Installation Guide

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

Rainwater Harvesting Kit (B) – 450m² Roof Area – the ideal accompaniment to the Enduramaxx Rainwater Harvesting Water Tank range. The rainwater filter system is designed for roof spaces up to a maximum of 450m² (per kit) and contains the following;

  • Combi filter unit with lid
  • Siphon overflow tube
  • Calmed inlet (pipe to go from the bottom of the filter to the bottom of the tank)

Water is equally distributed across the cascade where cleaning occurs, with the largest dirt particles forced across the primary filter cascade directly to the sewer.

Next, pre-filtered water then flows over the secondary filter sieve (mesh size 0.65 mm) where the mesh structure washes any remaining dirt into the sewer. Cleaned water flows into the tank via a calmed inlet, designed to undertake a secondary cleaning step by allowing the water to enter the tank with minimal turbulence. This ensures it does not disturb any sediment which may be present at the bottom of the tank.

Calmed rainwater entering the tank supplies oxygen to the water resting at the lower end of the tank, keeping it fresh by prevention of anaerobic decomposition. Finally the overflow siphon, which incorporates a skimming inlet, skims the surface water inside of the storage tank. This removes further debris, oils and other floating contaminants thereby increasing the quality of the stored water.

The filter kit is suitable for garden watering as well as a large range of other uses and helps to retain as much collected water as possible, whilst providing an efficient filtration system and regular replenishment of stored water.

  • Suitable for 110 mm (4”) downpipes
  • Filter unit weight 6.2 kg

Key Benefits

  • Designed for roof sizes up to a maximum of 450 sq metres (per kit)
  • Two step cleaning system independent of flow rate ensuring high filtering efficiency
  • Filter cartridge location assists continuous removal of dirt
  • Frost resistant
  • Self-Cleaning and low maintenance
  • Filter insert easily removable for cleaning
  • Suitable for 110 mm (4”) downpipes
  • Filter unit weight 6.2 kg
  • Siphon overflow with skimming inlet
  • Siphon overflow pipe to fit a 130 mm hole in storage tank wall
  • Calmed inlet to prevent incoming water disturbing any sediment in tank
  • Calmed inlet also ensures fresh water is supplied to lower area of the tank resulting in complete and regular replenishment of stored water
  • Wall bracket not included.

Note – it is recommended that the filter be cleaned several times a year dependant on how much rainfall there is. Refer to installation instructions for guidance on correct fitting.

Product Specification
Weight 6.2 kg
Product Specific Information

Rainwater Harvesting Installation Guide

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.