Review on Compact Gikfun Mini DC 6V to 12V R385 Water Cooled Water Pump: Efficient Air Diaphragm Pump EK1856 by Jamie Denison

This pump worked PERFECTLY right away. I'm using it with an Arduino for a small do-it-yourself irrigation system. I've bought other pumps in the past that worked but seemed to struggle. This pump has a high head, I have 3/8" OD tubing that connects to a small 1/4" OD tube that goes to a water jug. It transfers water easily and is actually very quiet! I bought 2 to prototype and experiment with but they sold me out. I will be ordering more very soon. From other reviews I've seen it says it's not self-priming. Mine had no problems refilling at all. I left a lot of air in the tube when I first plugged it in and it handles it with no problem.