From rainwater harvesting to geothermal systems and smart leak detection, John A. Mullen explores how cutting-edge plumbing strategies are reshaping sustainable design in 2025 to meet the challenges of climate change, efficiency, and public health.

Austin’s tallest building, the 74-story Waterline, uses PEX and CPVC piping to boost energy efficiency, cut installation costs by 20%, and meet LEED Gold goals—earning Project of the Year honors.

What does it take to build the world’s first stadium for a professional women’s soccer team? At CPKC Stadium, sustainable plumbing, smart drainage, and innovative design come together to redefine game day — and green building — in Kansas City.

From stadiums to civic offices, cutting-edge rainwater reuse systems are transforming green plumbing from theory to reality—saving water, slashing costs, and reshaping the industry’s role in sustainability.

Off-site manufacturing is shifting the building process to a controlled manufacturing environment. 

The 1 Java Street project in NYC’s Brooklyn borough is the largest mixed-use development in New York state to incorporate a ground-source geothermal system for heating and cooling.

A contestant in the International Living Future Institute’s Living Building Challenge, the PAE building’s sustainable water management showcases a comprehensive approach to achieving net-zero water use while redefining traditional notions of waste and promoting a closed-loop water cycle within the building.

A case study on the Waterbury YMCA’s steam boiler replacement and integration of a condensing boiler with co-gen system.

Discover how water-efficient toilets can provide cost savings for affordable senior living apartments that can be invested in other parts of the community for lifestyle amenities.

The Stockbridge-Munsee Band of Mohican Indians have always been good stewards of their community’s environment. It was no different when it came time to replace the HVAC system in their health center with a geothermal system, empowering the tribe to achieve greater energy independence.