I bought this to replace an existing pump in a small fountain. The original pump was a bit smaller and not adjustable so I had to move the hose and adjust the lever on the side to get the same effect. Once this is done it works fine. As for the three-pin plug with no ground wire, the body of this pump is made entirely of plastic, which means the ground wire has nothing to do with earth. And ground wire or not, in anything water related, GFCI is essential and GFCI does not depend on the ground wire to work. So there really is no point, and in fact the replacement pump was all plastic with 2 wires. Cable and connector for 2 pins. I appreciate the 3 pin connector as it is easier to connect to the new "tamper evident" connectors. I will also point out that the device is CE certified. So it was certified, just not UL.
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