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Very good and handy product. At first it didn't work. You could hear the motor running but no foam was coming out. Then i just blew to the intake tube with my mouth and cleaned it. Apparently it was clogged somewhere. After that it works great and gives nice foam as you can see on the picture. I am using the water to soap ratio of 3:1. Three times water and one time soap. If the soap is more dense you can easily use 4:1 ratio. Thank you Blitzwolf, thank you Banggood.
I have a problem i bought 6 units BW-FD2. The pump can't manage to lift anything out of the container at all, doesn't matter what soap or water to soap ratio. There may be a air leak somewhere or the pump is just faulty. There are several videos on YouTube so a lot of people are having this issue. Probably issue with quality control. I request a refund of the money please.