Simple and easy maintenance for your tankless water heater.
Over time, mineral deposits naturally build up in your tankless water heater.
Now you can easily flush out the build up and get your tankless water heater working like new.
Instructions for Use:
Prepare tankless water heater for flushing. Please refer to the manufacturers procedures. Isolation valves should be installed at time of heater’s original installation. An isolation valve kit must be installed or a complete disconnection of existing piping to the tankless water heater must be done to allow flushing of the heater’s heat exchanger.
Disconnect power and turn off main shut off valves, inlet and outlet on the isolation valves. This will prevent any flushing solution to enter the inlet or outlet water supply. Turn on both old and hot side service by-pass valves to allow flushing solution to pass through the tankless water heater only. Remove the inlet filter, clean out any debris and replace at this time.
Connect one end of feeder hose on to the pump’s ¾” discharge connection and connect other end to the cold water side inlet of the tankless water heater’s isolation valve. The isolation valve kit will have removable caps to allow a typical garden hose threaded adapter is used for flushing purposes. Both the cold and hot side will have this connection.
Add (1) quart of Delta Dissolve Descaler (DDD) to 5-gallon bucket. Four gallons of total solution is recommended to completely submerge pump for adquate flow. Additional DDD may be necessary in larger or heavily sealed systems.
Make sure the strainer is in place at the bottom of pail. This strainer helps to keep calcium debris away from the pump’s intake and entering the pump which could cause possible damage to the pump while in operation.
Place pump in the bottom of container, sitting on strainer. Do not plug pump in at this time!
Connect other remaining hose to the discharge (outgoing) hot side of the isolation valves and place end of hose into container.
Plug in pump and allow solution to recirculate 30-45 minutes or manufacturer’s recommended time length. Check discharge hose for flow. If there is no flow, disconnect power to pump and re-try. On occasion, pump has not self primed or is air-locked on initial startup. Do not allow solution to spill out of container. Full flow is needed to properly flush the calcium build-up scale from the heater’s heat exchanger.
After circulating, turn pump off and allow solution in heater and hoses to drain back into container. Dispose of used solution properly. Disconnect pump hose from the heater, leave discharge hose connected, turn incoming by-pass valves off and turn on main incoming cold water to allow clean water to rinse unit for a minimum of 3 to 5 minutes. After rinse is complete, turn water off, disconnect discharge hose, replace hose caps back onto isolation valves, turn incoming and outgoing valves back on, turn main water supply on and reconnect power. Turn on a faucet (hot side) to ensure the tankless water heater is furnishing hot water.
Rinse and clean all equipment and container for future use. Turn on faucet to check for hot water flow to make sure water heater is functioning.
