Rainwater Harvesting System for New Luxury Home
In the spring of 2025, construction began on a new luxury residential home in Pineville, North Carolina. The project included a new residential building, associated utilities, landscaping, and an underground rainwater harvesting tank.
Specified water quality unit elevated construction costs
The original project design specified a water quality unit to treat the runoff coming from the homeowner’s roof. However, this approach required a large underground detention system and water quality unit, driving up both material and installation costs.
ALternative StormTank design cuts costs and FOOTPRINT
During the design/review phase, StormTank proposed an alternate design that included a 36-inch-tall Module 25 Series system for rainwater harvesting, proposing that the owner could reuse the stormwater runoff instead of treating it. The City of Charlotte saw the cost savings and ultimately approved the design and eliminated the water quality requirements. The StormTank Module underground rainwater harvesting system:
• Removed an expensive water quality unit
• Lowered installation and material costs
As a result, the StormTank Module system was selected and installed in June of 2025.
Quick Cost-Saving Results
The StormTank rainwater harvesting system allowed for a cost-effective alternate to water quality treatment requirements. The StormTank module system was wrapped in a 30-mil PVC liner to make it a watertight system and then utilized a pump to be able to reuse the collected stormwater on site.
Project Partners
• Civil Engineer of Record: Gateway Design Group, Weddington, NC
• Developer: W.K. Phipps, Inc., Charlotte, NC
• Drainage Materials Distributor: Fortiline Waterworks, Charlotte, NC