Storage for domestic, household use (potable) is required by code to be NSF approved for drinking water. RainBank Rainwater Systems of Seattle recommends that any storage for residential systems meet this standard. An irrigation system can be converted to domestic use safely if the cistern is NSF approved.

Available space, along with aesthetics, should be considered in what type of watertankbest suits the intent and design.

Water tanks can be steel, polyethylene, fiberglass, or cement. There are bladder-type pillow tanks that can be placed in crawl spaces or buried tanks that have zero visual impact. Bolted together, galvanized steel water tanks have a liner inside the tank, while the steel shell provides protection and structure for the liner. Polyethylene (plastic) water tanks are the most cost effective. Additional tanks can easily be added in the future. Slimline tanks or Box tanks can be used for limited available space applications.

Installation requirements, codes, durability, warranty, and volume, should be considered as well.

A professional designer with experience in rainwater collection should have information to assist in making your decision for your water storage needs.

RainBankis an ARCSA accredited designer and full service installer of rainwater systems and also consults onwater systemsfor both potable, household water use and non-potable for landscaping irrigation and toilet flushing.RainBank will design, install and package systems from 2,500 gallons to 50,000 gallons. Contact us.