Innovative water solutions which save money and the environment

15+ years' industry knowledge

We’re experts in our field

Fast Delivery

Same day dispatch on many items

Helping the environment

With sustainable solutions

{"id":4665902268503,"title":"DROP Level 3 Rainwater Harvesting Calculation (Desktop Feasibility)","handle":"level-3-rainwater-harvesting-calculation","description":"\u003cp\u003eIf you're considering rainwater harvesting on a commercial scale or trying to achieve \u003ca href=\"https:\/\/www.freeflush.co.uk\/pages\/water-neutrality-in-the-uk-how-freeflush-can-help\"\u003ewater neutrality\u003c\/a\u003e a Level 3 Rainwater Harvesting Calculation may be suitable.  Our level 2 analysis is available for free by clicking \u003ca href=\"https:\/\/www.freeflush.co.uk\/pages\/rainwater-harvesting-calculator\"\u003ethis link.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFor large or complex schemes where significant economic benefits might be realised or where there is a temporal variation in demand it is suggested that continuous rainfall time series (or simulation modelling) should be used to address this variability in order to optimise the design in accordance with BS 8515\/BS16941. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDROP is an application of the storage equation on a continuous daily rainfall time   recorded in eight geographic areas (SW England and West, SE England, Central England, NW England and Wales, NE England, S. Scotland, N.  Scotland, E. Scotland). Calculated storage and overflow are displayed as exceedance curves.  \u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe output is a one page pdf document containing the : \u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eoptimised storage requirements\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003ereduction in mains water usage\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eproportion of time the tank overflows\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003ebudget cost benefit analysis (commercial only)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eOverflow Analysis\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eCO2 saved\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhat we require: \u003c\/p\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eSite Location\/ Site plans\/Elevations\/Drainage Plans​\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eUsable contributing drainage roof area to the rainwater tank \u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003etype of usage for which rainwater will be used \u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eexisting water usage data if available \u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eproposed demand from rainwater tank e.g 1m3\/day \u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003etypical occupancy if relevant to proposed rainwater usage \u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003esite\/roof\/drainage plans (and WC locations) \u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003ewhether a location for a loft\/header tank  tank is available ​​\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eRoof Type (tile\/metal profiled etc.)​\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAssumptions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFilter efficiency is 90%\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eYield based on roof type (Table 1 BS 8515:2009+A1:2013)\u003c\/li\u003e\n\u003c\/ul\u003e\nSimply email technical with the above details with your order number as the subject line. \u003cbr\u003e\n\u003cdiv\u003e\n\u003cp\u003eThe pdf will be delivered to the email address you have registered with. \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eIf you are combining attenuation with rainwater harvesting please contact us first. \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003eAllow 10 working days for the output to be delivered. \u003c\/p\u003e","published_at":"2020-12-07T13:12:10+00:00","created_at":"2020-12-07T13:05:51+00:00","vendor":"FreeFlush","type":"","tags":[],"price":12000,"price_min":12000,"price_max":12000,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":32440030330967,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"","requires_shipping":false,"taxable":true,"featured_image":null,"available":true,"name":"DROP Level 3 Rainwater Harvesting Calculation (Desktop Feasibility)","public_title":null,"options":["Default Title"],"price":12000,"weight":0,"compare_at_price":null,"inventory_quantity":-5,"inventory_management":null,"inventory_policy":"deny","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/cdn.shopify.com\/s\/files\/1\/0829\/4323\/products\/DROPoutput.jpg?v=1607347772"],"featured_image":"\/\/cdn.shopify.com\/s\/files\/1\/0829\/4323\/products\/DROPoutput.jpg?v=1607347772","options":["Title"],"media":[{"alt":null,"id":6995641139287,"position":1,"preview_image":{"aspect_ratio":0.674,"height":607,"width":409,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0829\/4323\/products\/DROPoutput.jpg?v=1607347772"},"aspect_ratio":0.674,"height":607,"media_type":"image","src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0829\/4323\/products\/DROPoutput.jpg?v=1607347772","width":409}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp\u003eIf you're considering rainwater harvesting on a commercial scale or trying to achieve \u003ca href=\"https:\/\/www.freeflush.co.uk\/pages\/water-neutrality-in-the-uk-how-freeflush-can-help\"\u003ewater neutrality\u003c\/a\u003e a Level 3 Rainwater Harvesting Calculation may be suitable.  Our level 2 analysis is available for free by clicking \u003ca href=\"https:\/\/www.freeflush.co.uk\/pages\/rainwater-harvesting-calculator\"\u003ethis link.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFor large or complex schemes where significant economic benefits might be realised or where there is a temporal variation in demand it is suggested that continuous rainfall time series (or simulation modelling) should be used to address this variability in order to optimise the design in accordance with BS 8515\/BS16941. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDROP is an application of the storage equation on a continuous daily rainfall time   recorded in eight geographic areas (SW England and West, SE England, Central England, NW England and Wales, NE England, S. Scotland, N.  Scotland, E. Scotland). Calculated storage and overflow are displayed as exceedance curves.  \u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe output is a one page pdf document containing the : \u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eoptimised storage requirements\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003ereduction in mains water usage\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eproportion of time the tank overflows\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003ebudget cost benefit analysis (commercial only)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eOverflow Analysis\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eCO2 saved\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhat we require: \u003c\/p\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eSite Location\/ Site plans\/Elevations\/Drainage Plans​\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eUsable contributing drainage roof area to the rainwater tank \u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003etype of usage for which rainwater will be used \u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eexisting water usage data if available \u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eproposed demand from rainwater tank e.g 1m3\/day \u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003etypical occupancy if relevant to proposed rainwater usage \u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003esite\/roof\/drainage plans (and WC locations) \u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003ewhether a location for a loft\/header tank  tank is available ​​\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eRoof Type (tile\/metal profiled etc.)​\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAssumptions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFilter efficiency is 90%\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eYield based on roof type (Table 1 BS 8515:2009+A1:2013)\u003c\/li\u003e\n\u003c\/ul\u003e\nSimply email technical with the above details with your order number as the subject line. \u003cbr\u003e\n\u003cdiv\u003e\n\u003cp\u003eThe pdf will be delivered to the email address you have registered with. \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eIf you are combining attenuation with rainwater harvesting please contact us first. \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003eAllow 10 working days for the output to be delivered. \u003c\/p\u003e"}

DROP Level 3 Rainwater Harvesting Calculation (Desktop Feasibility)

£120.00
Maximum quantity available reached.

If you're considering rainwater harvesting on a commercial scale or trying to achieve water neutrality a Level 3 Rainwater Harvesting Calculation may be suitable.  Our level 2 analysis is available for free by clicking this link.

For large or complex schemes where significant economic benefits might be realised or where there is a temporal variation in demand it is suggested that continuous rainfall time series (or simulation modelling) should be used to address this variability in order to optimise the design in accordance with BS 8515/BS16941.

DROP is an application of the storage equation on a continuous daily rainfall time   recorded in eight geographic areas (SW England and West, SE England, Central England, NW England and Wales, NE England, S. Scotland, N.  Scotland, E. Scotland). Calculated storage and overflow are displayed as exceedance curves. 

The output is a one page pdf document containing the : 

  • optimised storage requirements
  • reduction in mains water usage
  • proportion of time the tank overflows
  • budget cost benefit analysis (commercial only)
  • Overflow Analysis
  • CO2 saved

What we require: 

  • Site Location/ Site plans/Elevations/Drainage Plans​
  • Usable contributing drainage roof area to the rainwater tank 
  • type of usage for which rainwater will be used 
  • existing water usage data if available 
  • proposed demand from rainwater tank e.g 1m3/day 
  • typical occupancy if relevant to proposed rainwater usage 
  • site/roof/drainage plans (and WC locations) 
  • whether a location for a loft/header tank  tank is available ​​
  • Roof Type (tile/metal profiled etc.)​

Assumptions

  • Filter efficiency is 90%
  • Yield based on roof type (Table 1 BS 8515:2009+A1:2013)
Simply email technical with the above details with your order number as the subject line. 

The pdf will be delivered to the email address you have registered with. 

If you are combining attenuation with rainwater harvesting please contact us first. 

Allow 10 working days for the output to be delivered. 

There is no additional documentation for this product

The delivery information page is divided into 1. Specific and 2. General delivery information below. 

1. Specific Delivery Information relating to product lines
  • Small items dispatched daily with RM24 ~85% arriving next day
  • Large items (UK made) typically 5 - 15 working days (Parcelforce/Tuffnells etc.) 
The following items have a 2-4 week lead time:
    • Prestige Grit Bins
    • Prestige Square planters (Please get in touch)
    • 180l Washed Terracotta Planter
    • Cascata Water butt
    • Agua Water butt
    The following items (EU) are purchased on a pre order basis with a potential 4-8 weeks lead time:
      • Hydraloop
      • Grey Fountain Bowl
      • 100l Manhattan Black, Grey, White
      • All Ecosoft Items (Please email to confirm stock)
      • Noblesse - Charcoal
      • 3P Large Water butt - Water Pillar - 800l with quality filter and tap
      The following items (EU) are purchased on a pre order basis with a potential 6-8 week lead time:
      • 200l slim wall hung water butt
      The following items (EU) are purchased on a pre order basis with a potential 8-12 week lead time:
      • Column 500L - Green

      The following items (EU) are purchased on a pre order basis with a potential 12 week lead time:

      • Design (circular and modern) water butt stands
      • 700 Litre D Shape Water Tank
        2. General Delivery information

        We're a Manchester based company and ship to the UK at our standard rates. Please get in touch if you are based in the Highlands, UK island or Northern Ireland, surcharges may apply. 

        We no longer support ordering from the EU and NI through the website. We can support ad hoc orders with limited liability.

        Our design and Prestige range is available in the Netherlands, Ireland, Belgium, France, Germany, direct or through our distributors.

        Stock items will be dispatched on the day of order, if ordered before 1pm.

        Letters are sent 1st class. 

        Parcels <2kg are shipped with Royal Mail 24 Tracked with the following target delivery times.

        A loss/replacement can only be pursued in line with the target delivery times of the courier or once the courier accept loss. 

        Bulky items (and pallet deliveries) are dispatched within 2-5 working days. We will request a contact number if this has not been provided at checkout. 

        Some items are made to order (bespoke) and details are given on the listing for dispatch times.  If for any reason we anticipate a delay on our normal dispatch time we will contact you to let you know.

        Occasionally there are delays. We shall not be liable for any direct or indirect losses, costs, damages or expenses incurred by you or any other person for any delays in delivery.

        Missed deliveries where attempted delivery has been made usually result in re-deliveries the following day. The customer is responsible for organising re deliveries by contacting the courier direct

        Parcels/deliveries can only be "left out" if the delivering company allows that option. Parcelforce, for example, do not allow a parcel to be "left out". 

        We are an environment centric business and as such we try to minimise our waste. Our packaging is usually recycled and/or recyclable and we make efficient use of packaging to minimise wastage.

        Covid delivery updates between 12.3.20 and 11.1.21 21 have been archived here.