I've spoken with someone over at jebao. I help out with a local fish store and the owner is German, doesn't speak so good english.. Anyways, over at Jebao they speak good english, I was told they have a 1 year warranty.. I would bet that their warranty process works like many other companies - they don't want to deal with the end user because it takes too much time and cost dealing with individual RMA's. What they want to do is get a box periodically with a bunch of RMA stuff and replace it to the dealer/wholesaler. It costs real money to have staff unbox junk and test dozens or hundreds of boxes, and send out new. It also adds a line of "defense" against getting working product returned as defective for no reason, which is a HUGE problem for retailers here.
Jebao works like many other chinese manufacturers, in that they don't stock anything. When you order, that's when they make your stuff. They do sell replacement parts (which my friend will be stocking).
Anyways, the pump has built in flow control, you just need to add a $2 potentiometer to "unlock" it. something like a 10k pot, with the middle lead going to the "VA" input on the pump, one side of the pot to ground and the other to the VA output from the controller chip. :deadhorse1: