Webmost of the opportunities for energy and water conservation in a plumbing system arise from specifying an efficient water heater, an efficient clothes washer and. From conserving water to. From faucets that reduce water flow without compromising performance to toilets that use less. Keep reading as we explore the basics of sustainable plumbing. This guide will tell you. Webgreen plumbing is an approach to plumbing that focuses on reducing water wastage, conserving energy, and minimizing the environmental impact of plumbing.