Rainwater Catchment, Residential Rainwater Collection

How You Can Cut Your Seattle Water Bill in Half


Toilet and laundry account for 51% of domestic water usage, which can be very expensive, especially when you are actually flushing it down the drain.

Close-up of a worn, metallic fountain pen nib on a black surface.You can cut your water bill in half by installing a rainwater collection system like the one RainBank has designed and is currently building in Bellevue, WA. This rainwater harvesting system is a 7,200 gallon buried tank for a newly constructed residence. The four 1800 gallon tanks will provide water for toilet flushing, laundry facility, and some irrigation. The tanks are designed to be buried with three feet of soil on top, putting them out of sight and allowing landscaping to be in place.

As a bonus, the stored water can also be an auxiliary supply for firefighting with a simple hydrant.

Do you have an old swimming pool that is no longer wanted? That is what this hole was before RainBank’s installation.

Rainwater Catchment, Residential Rainwater Collection

Seattle Approves First Potable Rainwater Collection System for Residential Use

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A row of large brown water tanks installed outdoors along a narrow pathway.RainBank is pleased to have designed and installed the first rainwater collection system for potable usage in Seattle city limits. It is supplementary to city water and uses just 3,000 gallons of storage and deionization filtration for collection from an asphalt shingle roof.

The deionization filtration system will remove all toxins from the asphalt roof, and bring the pH level to nominal 7.0. The system will mitigate 65% of the customer’s city water usage. The potable water is of laboratory ultra-pure quality, as proven by samples taken and sent to the lab. The six 530 gallon tanks are a slim line design, enabling placement in a confined area.

A row of large brown water tanks installed outdoors along a narrow pathway.Have you thought about rainwater collection for potable usage but were deterred because you have an asphalt shingle roof? Here is your answer.

Rainwater Catchment

Rainwater Collection Tips, Tricks and Useful Information


Close-up of a worn, metallic fountain pen nib on a black surface.RainBank is excited to bring you all the information you seek about Rainwater catchment, rainwater collection and rainwater harvesting. We’ll share stories and photos about past and current projects and trends in residential and commercial rainwater collection.

We want to hear from you: Leave a comment if you have specific questions and we’ll try to answer either here or in a blog post.

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Rainwater Systems