The pump stopped working in 3 months. I checked the adaptor for output voltage and the pump for continuity, they both are OK. Then I disassembled the pump, cleaned the deposits with a toothbrush, and the calk (on the rotor) with the backside of the knife. Assembled the pump in reverse order. The cats are happy and I hope you too, dear viewer because you can do it for 15 min!
![](https://s2.save4k.ru/pic/G3GLzUnsxWo/mqdefault.jpg)