Bests & Worsts Reviews from Amazon

My wife asked me to find another solution to placing 5 gallon bottles up on top of the water dispenser we purchased from Arrowhead. I went online and searched "bottled water dispensers" both on Google and Amazon and studies the offerings, then I read the reviews; Not too encouraging! Being a dentist who has maintained his office facility for forty years, I know something about water pumps. I was not impressed with the designs and complexity of some of these systems; plumbing, electrical and space requirements. I wanted something simple and reliable. When I spotted the TeraPump I knew this was what I was looking for; simple design (KISS), no batteries, no electrical hookup, inexpensive, reliable if well made. It arrived a half hour ago and it works PERFECTFULLY, here's why. The very large pump body moves 4 oz per stroke and the large return spring cycles rapidly so you can pump continuously and fill a quart container in less than 8 seconds, ( One tenth the time it takes our gravity drained dispenser) due to the very low resistance in the smooth bore 1/2" tubes. This is due to the design which uses the water bottle as a pressure chamber and the pump just pumps air into the bottle displacing the water up through the delivery tube, and once pressure is accumulated the water just flows. It's easy to overflow a container if you pump too long as there is no shut off. It took only minutes to assemble, just select the correct tubing lengths for the size of the bottle. It will reach all the way to the bottom of the bottle so it leaves only a few ounces in an otherwise empty container. It took me a few minutes to figure out how to attach the pump assembly correctly to the bottle. The directions are accurate, but not apparent to someone who has never done it. Place the pump assembly into the top of the bottle, depress the pump and hold assemble down on the bottle with one hand, then rotate the cap counter-clockwise until it is raised up to the bottom of the pump body, then while holding downward seating force, turn the collar clock-wise and downward until the stop ring is visible on the inside tube. That's it I can't comment on its durability, but build quality is excellent! I expect it to work for years and at this price who cares if it doesn't. I just ordered another one for our earthquake kit. I can think of many other practical uses for this product