Review on TERA PUMP TRDP14 - 2PK Siphon Manual Hand-Operated Liquid Transfer Pump for Light Oils, Kerosene, and Water-Based Chemicals by Carl Mayes

Excellent product. This is a very simple design, but it works like a charm. I've seen reviews and questions saying they can't get a continuous siphon. I have a little advice for these users: First, make sure the top valve is closed and the receiver is at a lower elevation (no news). Make sure the hole is over the red light. Pump gently a few times until the liquid reaches the end of the tubing. Make sure you have a continuous column of liquid with no bubbles. Then seal it with your thumb and gently lower the outlet tube so it is filled with liquid and then release (= take your finger away) onto the receptacle (of course only use this method with non-caustic/toxic liquids. ah!)