Navien is pleased to announce the introduction of the new chemical-free anti-scale water treatment accessory called PeakFlow™. Critical for system longevity, and an environmentally friendly effective alternative to water softeners, this product provides protection from scale formation on plumbing surfaces in appliances and hot water systems. The pre-installed inlet ball valve on the 15 lb. (6.8kg) single cartridge provides easy isolation shut-off and filter changes. Certified to NSF / ANSI Standard 42 and 61.  www.Navien.com. About Navien: An official ENERGY STAR^® partner of the Residential Water Heater Program, Navien is the recognized leader in condensing technology and combination gas boilers. Navien products are available in the United States and Canada through a selected network of wholesale distributors. For more information visit us at Navien.com.