Jet siphons are commonly used today as a means by which to transfer water from one dump tank to another during a tanker shuttle operation. One important tip about using a jet siphon is that when we remove the "jet" function from the jet siphon, the device can become just a plain old siphon. This happens when we place BOTH ends of the suction hose underwater in the two tanks. As long as the "jet" is being pumped, water moves to the discharge tank. HOWEVER, when we turn off the jet feature (because the discharge tank is full) and we have BOTH ends in the water, then the two tanks will attmept to equalize - which means water will flow BACK into the tank that it just got pushed out of. Therefore, it is best practice to keep the discharge end of the jet siphon suction hose out of the water.