Rainwater Catchment

Rainwater Systems Designs


Close-up of a worn, metallic fountain pen nib on a black surface.RainBank Rainwater Systems designs potable and non potable rainwater catchment systems throughout Washington, Oregon, and Idaho.

RainBank’s experiencedteamprovides customers with an integrated, progressive approach to sustainable, premium water systems.

Our customers include;

  • Eco-friendlyhomeownersseeking to add rainwater collection or integrateinto plans for anew premiumorcustom built residence
  • Architectsdeveloping plans forpremium residential projects
  • High-endbuilding contractorsspecializing in custom builds
  • Commercial contractorswhere rainwater harvesting is a component tothe scope of the project

We work closely with our clients early on in the projectto insure the system design will meet the client’s needs and desires. Wespec onlyquality components, chosen based on our 15 years ofexperience,ensuring performance for years to come.

RainBank is a full service LLC with in-house engineering, design team, and licensed plumber. Our designs meet all county and state plumbing codes and their requirements. RainBank isfamiliar with the permitting process in most counties and will process the permitting to alleviatethe guesswork for our clients. Our designs include;

  • Calculations of domestic demands & supply, MIDs, & sizing
  • Drawings from down spout to storage, cistern placement, conveyance, filtration train, connection to household and civil
  • Complete list and specs of components along with manufacturer cut sheets
  • Operations and maintenance manual
  • County permitting from health department

We install our own designs to ensure the system will meet the high standards we have set in the industry. We offer inspections of other systems for evaluation, real estate and insurance transactions, always with a detailed written report including sampling results and photos for submittal.

RainBank’s team is ARCSA Accredited & ARCSA Inspector Specialists.

Need more info? Contact us below:

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Rainwater Catchment, Water Tanks

Fire Protection Water Storage

You may have read that RainBank is a Master Dealer for water tanks by Contain Water Systems.

Why Contain?

They are the manufacturer of corrugated steel liquid storage tanks primarily used for the storage of water. Contain’s water series tanks and accessories come with a 20 year warranty, the longest in the industry, backed by a team of certified installers around the country ready to provide a top notch installation service for your project site.

As the most experienced designer and installer of rainwater systems in the Pacific Northwest, RainBank selects the highest quality materials and products for its customers. Many of the systems we built early on are still operating – and our customers still refer us – because our systems are build to last. With a 20 year warranty, Contain Water Systems’ steel water tanks are the perfect fit for RainBank’s selective customers.

More about Contain Water Systems Tanks and Accessories

  • Contain Water Systems Inc. Water Series tanks & accessories are designed and engineered for several applications. Rainwater harvesting, stormwater management, fire protection, irrigation, agricultural, industrial, mining, potable drinking water and many other applications.
  • Contain Water Systems Inc. water series tanks & accessories are manufactured from high quality corrugated, hot-dipped galvanized steel for superior strength and durability.
  • Contain Water Systems Inc. includes a full scale structural engineering package with each estimation designed to the seismic area in your project location throughout the USA & Canada.

Please enjoy these photos from a recent custom engineered project from Contain Water Systems Inc. This tank was built inside a pre-assembled enclosure. Model CGS 1806 NFPA 22 Fire Protection Tank providing  the customer with 41,500 gallons of fire protection water storage.

Contact us about your next project today.

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How-to, Rainwater Catchment

How to Move Collected Water From Tank

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Submersible water pump with float switch and control box.To move collected water from a tank for filtration and then use, installing a submersible pump or centrifugal pressure pump is necessary to get the job done. Additionally, if you go with a submersible pump, it will also need a way to manage and regulate movement.

A pressure tank with a pressure switch will tell the pump when to turn on and off by a drop of pressure in the pressure tank. This application is much like well system and is intended for household use. It could be used for irrigation, but keep in mind that the pressure tank will need to be frost protected.

A stainless steel cylindrical gas heater with a black front.The most common method of conveyance would be a booster pump. These pumps are generally centrifugal pumps and can be placed in the mechanical room or well shed.

A centrifugal booster pump is used without an exterior pressure tank and is considered an “on demand” pump, meaning that when the faucet is opened, the pressure in the pump drops down to low pressure – usually 20 PSI, and the pump will start running and maintain constant pressure while the faucet is open. Once the faucet is closed, the pump will continue to run until it meets its high pressure cut off.

It is important to remember that either pump system should always be used before filtration and disinfection.

This was firstpublishedas Part 7 in the series “How to Build a Rainwater Collection System”. Click to see partsone,two,three,four, fiveandsix.

Rainwater Systems