Design, Furnish, and Turnkey Solutions

This Rainwater Catchment Design and Installation Standard, (hereinafter referred to as the Standard) has been developed by a joint effort of the American Rainwater Catchment Systems Association (ARCSA) and the American Society of Plumbing Engineers (ASPE).

The purpose of this standard is to assist engineers, designers, plumbers, builders / developers, local government, and end users in safely implementing a rainwater catchment system.  This standard is intended to apply to new rainwater catchment installations, as well as alterations, additions, maintenance and repairs to existing installations.  Below are the key components within a designed system:

  • Collection Parameters
  • Conveyance System         
  • Cisterns and Storage
  • Pump
  • Filtration
  • Piping
  • Potable Rainwater

Rainwater harvesting is suitable for all building types ranging from residential to commercial and industrial and can be retro-fitted to existing buildings or integrated into new building designs.  Collected rooftop water can be used for non-potable (non-drinking water) and potable (drinking water) demands.

Additional water treatment components must be installed to turn potable water into drinking water standards. Many households and businesses use potable water for non-potable needs (see list below).  The majority of the water a household or business uses is for non-potable needs.  Utilizing potable water for non-potable needs wastes resources and places unneeded strain on local treatment plants. Non-potable demands include:

  • Building Washing/Pressure Washing
  • Cooling Towers                                
  • Toilet Flushing/Laundry Washing
  • Car Washing/Detailing
  • Fire Suppression
  • Commercial and Household Cleaning
  • Irrigation
  • Industrial Processing