The Eccotemp EZ-FLUSH System Descaler Kit is the answer to any water scale, lime, or rust deposit build-up in virtually any piece of water based equipment. The EZ-FLUSH system has been designed to work seamlessly with tankless water heaters and is compact for easy use and storage. It includes our Eccotemp EZ-Scale Descaler Solution that is specifically made to dissolve the toughest build-up and is a non-toxic concentrate which is certified to NSF/ANSI 60 for use as a cleaner in potable water systems. Keep your Tankless Water Heater running at full efficiency and ensure it provides hot water for years to come with the Eccotemp EZ-FLUSH System Descaler Kit. This bundle includes the Eccotemp 3/4" Service Valve Kit (Lead Free) by Jomar. 3 Way Ball Tankless Water Heater Valve Kit Threaded, Solder, or Press Connections 600 WOG Certified to NSF/ANSI 61