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#Tub spout leaking full#

On February 8, 2017, EPA hosted a teleconference and webinar with stakeholders to discuss the NOI.

Bath and Shower Diverter NOI (PDF) (12 pp, 489 K, About PDF).

Replacing a leaking diverter with a more efficient model could result in considerable water and energy savings. The goal is to help increase water efficiency in the residential and commercial sectors, recognize the most efficient technology available, and eliminate unnecessary leaks and water waste. In December 2016, EPA issued a Notice of Intent (NOI) to develop a specification for bath and shower diverters. However, WaterSense has identified viable and readily available bath and shower diverter models that can eliminate leaks altogether.

In recent years, the California Energy Commission has led the charge in adopting efficiency requirements for bath and shower diverters that aim to significantly reduce leak rates over the current national standard. In some cases, the studies identified leaks of up to 3.0 gpm, which is more than the flow rate from a typical showerhead. Field studies have shown bath and shower diverter leak rates averaging three to eight times the leak rate allowed by the current standard. Many older bath and shower diverters installed in homes across the United States have much higher leak rates, resulting in considerable water waste with every shower.

#Tub spout leaking full#

This is equivalent to a half gallon and a full gallon of water, respectively, wasted over the course of a typical shower. In fact, the current national plumbing standard sets an allowable leak rate of 0.1 gallons per minute (gpm) for a bath and shower diverter prior to life cycle testing (i.e., when new) and 0.2 gpm after life cycle testing (i.e., at the end of the product’s life). Many bath and shower diverters currently installed leak a small amount of water from the tub spout while they are engaged and the water is being diverted to the showerhead.