REPLACING THE PUMP TUBING
The pumps and tubing used in the dispenser are designed to give maximum performance and long life. However, the tubes are a wear item and must be replaced periodically. How long the tubes last is dependent on usage and properties of the concentrate. Excessive wear will reduce the output of the pumps resulting in a weak mixed beverage. Bunn-O-Matic recommends replacing the Pump Tubing a minimum of once every 6 months or sooner if warranted.
Note: Replacement Tube/Adapter Kits can be purchased from BUNN-O-MATIC.
DRAINING THE HOT WATER TANK
CAUTION: The dispenser must be disconnected from the power source throughout these steps.
Note: The dispenser must be refilled using the Initial Fill & Heat steps before reconnecting the power source.
Source: MaintainX (Community Member)