Indoor Cistern
A 4,000-gallon cistern located inside the warehouse of the WSSI office collects runoff from the building’s main roof. It is sized to retain the equivalent of one-quarter inch of water from the roof. The water stored by the cistern is used to flush all onsite toilets, conserving about 48,000 gallons of potable water annually.
Contact us for more information including: plumbing plans, screens, and pumps. [gated content]
Outdoor Cistern
An 8,000-gallon underground cistern located next to the rain garden collects the runoff from the main roof and the green roof (approximately 28,000 square feet total), as well as any overflow from the indoor cistern.
One-half inch of water from the roof (the “first flush”) is captured in the cistern to irrigate the site landscaping, and any excess flows through the underdrain network to the rain garden. The cistern pumps water through a drip irrigation system consisting of a network of flexible tubing all around the site.
Contact us for details of the outdoor cistern and irrigation layout.