Canadian Association for Rainwater Management

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Rainwater Harvesting - Tank Sizing - What Rainwater tank is the Perfect Size?

  • 18 Apr 2018
  • 10:00 AM - 11:00 AM (PDT)
  • Online Webinar


Registration is closed

Lets take a serious look at how to properly size a rainwater tank!  We will look at 5 methods to size a rainwater tank and compare the results form three different scenarios.  Covering both residential  and commercial scenarios this webinars will help homeowners, plumbers, trades, contractors, builders, engineers, architects, and the public sector. 

In real world scenarios you can never reach ‘maximum potential’ as there is loss from the roof, pre-filter, and tank overflow events. Furthermore, the size of your tank and how much water is used daily from the tank play an important role in determining how much rainwater you can actually collect and use. Actual usable rainwater forms the basis for determining Return On Investment, as tanks are the single most costly item in a rainwater harvesting system. Determining the smallest tank size that will collect the most water based on the three criteria listed above, will significantly impact the total cost of your rainwater harvesting system.

An essential element in the design of a Rainwater Harvesting System is the water demand. The use of improper water figures can result in either the system being unable to consistently meet daily water demand of users, hence, requiring the tank to be topped up form trucked water or secondary water supply, or in the case of an over-designed cistern, wasteful capital investment. In either situation it is critical that the water demand value employed in the design process be as representative as possible. 

Hosted By Benjamin Morrison, Water Resources Engineering Technologist

CANARM President  

Canadian Association for Rainwater Management

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