Commercial rainwater harvesting easy calculator Please fill out this form to assist us with calculating your rainwater savings potential If you are a human and are seeing this field, please leave it blank. Fields marked with an * are required First Name Last Name Project Address City Post Code Phone Email Project Name (or reference if applicable) Project Type New Build Retrofit Other Reason for requirement To satisfy BREEAM requirement To reduce site surface water run-off To maximise water cost savings for site To reduce the environmental impact of the project Designed to BS8515 standards Other Roof/catchment area (sqm) - refer to How to measure your catchment area if unsure Roof drainage system type Hard roof Green roof Pitched roof Flat roof Other What will the rainwater be used for? Toilet Flushing No of toilets served Flow rate if known Urinals No of urinals served Flow rate if known Commercial processes Brief description & volume of water used in 1 x 24hr period Laundry Volume of water used in 1 x 24hr period Irrigation Volume of water used in 1 x 24hr period Other Maximum number of people on site Building opening times Tank location Above ground Below ground Will the tank be in a pedestrian or trafficked area Pedestrian Trafficked Preferred system type Direct feed system Gravity system Hybrid (direct with break tank) Will the rainwater be delivered: Direct to appliances High level tank Break tank/booster set What is the required pressure in the system(bar) What is the required flow rate in the system (l/S) Route distance from holding tank to control(m) Height from ground to highest part of plumbing system(m) Distance from tank to appliances to headet tank(m) What diameter pipe will be used to carry rainwater(mm) Is a standby pump / dual system required Yes No Do you require additional water treatment e.g. ultraviolet water treatment Yes No Additional information What is the capital of England? *
