About Chromex Tools Designed and built to maximize efficiency, Chromex Tools offers innovative solutions that simplifies and improves your workflow as well as reduces time required to complete complicated tasks. Intended for professionals yet easy and safe enough to be used by DIY enthusiasts. Innovating, learning and expanding our range of products with direct feedback from our community Since 2015 4 Piece Tankless Water Heater Flush Kit Helps maintain and extend the lifespan of your tankless water heater This tankless water-heater cleaning kit includes everything you need to fully maintain your water-heating system. It comes with step-by-step instructions that are easy to follow, and it connects easily to the tankless isolation valves using the supplied 6-foot hoses. To ensure that a water heater continues to work at an optimum level, it is necessary to descale the appliance. This will mean removing the deposits that can build up from the use of hard water. Kit comes with 3.5 gallon bucket with lid, 1/6 HP pump, 2 steel hoses and an elevated pump grate 2 steel hoses easily connect to tankless heater valves and the kit will clean most heaters in 30 minutes or less Just add 2-3 gallons of vinegar or your own descaling solution Hard water is formed when water percolates through deposits of limestone, chalk or gypsum which are largely made up of calcium and magnesium carbonates, bicarbonates and sulfates. Descaling Directions: Disconnect power to water heater (electricity or gas as per manufacturer)Shut off main water supply valve to tankless water heating unitClose hot and cold water isolation valves and remove service caps (if isolation valves have not been installed on your heater, the heater must be disconnected and drained and the hoses directly to the hot and cold connectionsClean cold water inlet screen of any sediment or dirtAdd 2-3 quarts of vinegar or your own descaling solution, or a pound of descaling powder into two gallons of water in the provided bucketConnect one hose to pump's discharge outlet and the other end of the same hose to the cold isolation valve on the tankless water heaterConnect second hose to the hot isolation valve on the tankless water heater and the other end of the hose directly into the bucketOpen both the hot and cold isolation valvesTurn pump on and allow the solution to circulate for 20 minutes for proper cleaning. Never allow pump to run without adequate liquid in bucket or it will damage the pump.After cleaning is complete turn off the pumpClose cold isolation valve, remove the hose and replace the service gapRemove pump from the bucket and dispose the used cleaning solutionFlush tankless water heater for 5 minutes or until clear water flow by opening the main water supply, open cold isolation valve and let water pass through hot water valve to drain on the bucketClose hot water service valve and remove hose, replace with cap and open hot isolation valveClean cold water inlet screen of any sediment or dirtExamine all valves for a final check, afterwards connect power to water heater