An instrument that is operating properly will produce a water flow of 15 to 20 gallons of water during a 60 minute run. When the instrument is not operating, no water should be flowing. If there is any water going out the drain, water valves, Q1, Q2, or Q3 need to be serviced. During the run, water will flow at different rates. During filling, there should be a steady stream of water flowing out the drain, but no water flowing through the flowmeter in front. Once the instrument reaches 90C, the reflux water valve (Q2), will turn on and off every minute or 2 throughout the extraction. When it turns on, the flowmeter should indicate at least 2-3 GPH (gallons/hour.) If your supply water is cold, a flow of 2-3 will work fine. A flow of 4-6 GPH would be ideal but it depends on the incoming water supply pressure. If there is good pressure but more flow is not achieved by adjusting the flowmeter, there may be a restriction in the water line or the flowmeter may need to be replaced.

At the end of a run, during the heater cooling cycle, there will be a noticeable higher water flow through the instrument. The water exiting the drain tube should be cool. If the water flow is a trickle throughout the run, the water filter (X97) may be clogged. The filter is the fitting that connects the water supply to the instrument. The filter may be removed to try to blow it out. If this doesn't work, a replacement filter (X97) may be ordered.