Rainwater Home Harvest Direct Water Tank 4400 Kit


Product Ref: HD4400

Customer Offloading MDPE Below Ground
  • Volume: 4400ltr
  • Weight: 310.000kg
  • Dimensions: L:2400mm W:2400mm H:1250mm
  • Home Delivery

    UK mainland delivery from £155.00 ex VAT

    check delivery cost


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    Product Description

    Rainwater Harvesting Below Ground Water Tanks 4400 Kit

    When supply of rainwater is exhausted, the 'backup in a box' unit uses mains water to replenish the tank. The pump in the tank is then ensured of a constant supply of water to feed washing machines, toilets, garden taps, etc Harlequin''s 'HydroStore' tanks benefit from the company''s experience in providing tanks for underground installation as well as recognising the engineering progress being made in the global rainwater harvesting sector.

    The HydroStore allows full capacity storage and when installed above the natural water table, does not require a concrete surround.

    The lower part of the body has vertical flats which allow interconnecting pipework and the linking together of multiple tanks to provide greater storage capacities.  The HydroStore has been designed to minimise materials and installation costs. The base of the tank is flat which helps with installation and allows complete drainage of the tank when cleaning.  The cover is retained using a single bolt and can be removed completely to leave clear access. Surface water is directed down past the lid and turret to soak away into the surrounding soil. Ultimately, these tanks become air pockets under the ground, allowing their volume to be flooded with recovered and usable water.  Above ground they do not impede on available space which can be used for more diverse, practical and imaginative purposes. Modular design - Allows increased capacity by linking together multiple tanks. Large diameter flat load-bearing lid for easy access, unobtrusive to pedestrians, lawnmowers, etc. Turret - Diverts potentially contaminated surface water away to preserve integrity of captured water. 500mm invert depth as standard, with collars available to enable adaptation to site conditions. Inlet - Calmed inlet reduces turbulence to tank sediment, improving water quality to property. Filter - Self-cleaning, low maintenance filters, with no consumable parts, at inlet and pump ensure clear water supply. Tank body - Seamless, one-piece moulding eliminates on-site 'assembly' and guarantees internal cleanliness. Flat base for stability and integrated lifting points for ease during handling and installation. Entire capacity utilised, ie, no potential air pockets or base ribs to reduce 'working' volume. Pump - Pressure-sensitive (turns off if no demand), dry-run protected (turns off if no water detected) pump for extended service life. Pump outlet capable of delivering 2500ltr/hour, nominal 35m head, and 3.5 bar pressure to guarantee reliable, constant and efficient supply. Shallow excavation + no concrete backfill = reduced installation costs. The installation of the HydroStore couldn''t be easier or more cost effective.  The overall design of the tank is aimed at reducing costs from delivery to installation and from day-to-day use to annual maintenance. The HydroStore is designed to allow two people - using the most basic digging equipment, ie, a couple of shovels -to move and install a system. Another key benefit of the tanks'' low height is that no concrete backfill is required as long as the water table does not rise above the base of the tank.

    Water table considerations
    Even if no water table exists, if the complete surrounding soil structure is non porous, eg, clay, a danger exists of water pooling around the tank within the backfill. In this circumstance either a land drain should be installed to
    continually drain the installation or an alternate location selected.

    HydroStore Home Harvest Underground Tank (Mains Backup in box)

    Please be aware that there are 2 tanks supplied, however we do not provide the joining kit for these tanks.

    Product Details

    • Product Code: HQ
    • Customer Offloading: Customer Offloading
    • Material: MDPE
    • Potable: Non Potable
    • Tank Use: Below Ground


    Our shipping costs cover most of the UK - however, parts of England, Scottish Highlands and Islands including areas north of the Glasgow / Edinburgh border, Isle of Wight, Channel Islands, Isle of Man, Anglesey, Western Isles, Shetland Islands, Orkney Islands, Isles of Scilly, Northern Ireland and the Republic of Ireland may cost more.

    Please call before ordering if the delivery postcode is listed below. There may be additional shipping costs. AB, BT, CA, CT, DD, DG, EH, FK, G, GY, IM, IV, JE, KA, KW, KY, LD, LL, ML, PA, PH, PO 30-41 (Isle of Wight), SA, SY, TD, TN, TR, ZE Southern Ireland

    Our lead times should only be used as a guide and are subject to change.


    Unless a hi-ab delivery has been booked at additional cost, it is the customer's responsibility to offload with suitable equipment on the day of delivery and a failed delivery may result in additional charges.

    We recommend installers and/or plant hire & materials to install such as excavators, aggregates etc are not booked until you are in receipt of the goods. Tanks Direct cannot be held responsible for costs incurred due to unforeseen delays, please see our terms for more details.


    HIAB delivery will be required if you need the tank offloaded from the delivery vehicle. The driver will unload the tank from the vehicle to ground level, however this service is not to place the tank in situ, this will need to be arranged separately.

    If you have any questions regarding your delivery, please contact the Sales Team on 01643 703358.

    Returns Information

    Please note - Certain items may not be returnable, for example those made to order or for sanitary reasons. Please check the product page for more information.

    Customers may return items within 14 calendar days (as per our Terms & Conditions) - refer to section 7. **

    All Items must be returned unused, refunds cannot be issued for used or previously installed items.

    Please be aware that returning a tank can be complicated and expensive, so please check that you are ordering the correct item (we suggest checking the dimensions very carefully).

    If you wish to return goods, please complete the form on this page to provide further information.

    Once your request is approved, a valid Returns Authorisation Number (RAN) will be issued to initiate the returns process along with information on how & where to return your order along with any costs involved.

    Please DO NOT return any goods without this authorisation. Goods cannot be accepted without this.

    Returns are not accepted at our Minehead Office, please wait until we contact you before returning any goods.

    View Tanks Direct's return policy now.