Rain to Recreation

Rain to Recreation highlights a South Seattle family’s innovative journey transforming water runoff from a large single-family residence into a sustainable water source for swimming pool maintenance, leveraging the RainWise Incentive Program for immediate cost savings. This success story demonstrates how smart design and local rebates turn urban rainfall into a viable resource, benefiting both homeowners and the community.

Discover how a South Seattle family transformed rooftop rainwater into a sustainable source for swimming pool maintenance. This thoughtful design maximizes utility, supports the community, and showcases how everyday homeowners can lead the charge in urban water conservation.

Site Description

A large brick single-family residence in South Seattle, the property features a total roof area of 1,800 square feet confirmed by satellite imagery and on-site measurement. The available area for rainwater storage was constrained to the north side of the residence, parallel to the swimming pool.

Site photo before project Before Project
Site photo

Site Constraint

The only location suitable for placing the rain tank was on the north side of the property at ground level, parallel to the pool. This placement was both a constraint and an opportunity, as it aligned with the homeowner's preference for accessibility and system efficiency.

1,800 sq. ft.
Roof Area
20,375 gal
Annual Rainfall (Mar–Nov)
16,300 gal
Rain Harvest (Apr–Oct)
Satellite Imagery & Measurement
Rainwater calculator used

Purpose and Value

Swimming Pool Water Offset
Rainwater replaces utility water lost to evaporation
Improved Drainage & Reliability
Site drainage enhanced, reducing flood risks
$
Cost Savings
Lower water bills through reuse & incentives

Homeowner Goals and Inspiration

🌧️ Support RainWise & Citywide Stormwater Management
Joined the RainWise program to help make Seattle’s water infrastructure better for everyone.
🏊 Capture Rain for Recreational Use
Optimized the roof catchment to supply water for the swimming pool rather than wasting local rainfall.
🏡 Inspire Neighbors & Sustainability
Demonstrates how rain harvesting can benefit homes and inspire others to join local eco-efforts.
Learn more about joining RainWise and eligible rebates: RainWise Contractors.206-450-0231

System Overview

Rain Tank Infographic

Rainwater Tank Specifications

  • 🛢️ Capacity: 1,280 US Gallons
  • 🏗️ Material: Polyethylene, UV Stabilized
  • 📏 Dimensions: Diameter: 71", Height: 103"
  • 🧩 Features: Vented Access Lid, 2" Threaded Outlet
  • 🎨 Color Options: Green or Black
1. Water Inlet (West & East Sides)
Water Inlet: West & East
Rain flows into the main tank from both west and east catchments.
2. Overflow (3" Outlet)
Overflow Top of Tank
When full, excess water exits the tank via a 3-inch overflow pipe at the top.
3. Low Flow & Shutoff
Low Flow Fitting and Shutoff
A low-flow fitting with shutoff valve allows for gallons managed annually (GMA).
4. Side Sewer Connection
Connection to Side Sewer
Water is safely conveyed to the side sewer, handling up to 36,000 gallons per year.