Gikfun DC 3V 5V Micro Submersible Mini Water Pump (Pack of 4pcs) EK1893

I bought this pack of 4 mini submersible water pumps for my husband who is always building things, doing projects. My package arrived within 2 days. 2 of the pumps worked, the other 2 did not. For the price I paid I am not upset over the fact 2 didn't work. Stuff happens. I contacted the seller and they promptly got back in touch with me. Let me know they have shipped me another pack of 4 pumps. The 2 pumps that are working, work great as they should. I have no complaints. I would recommend these to anyone. I would definitely buy again!

Not super great with unclean water, gums up eventually if there's too much cleaning solution in the water

For some small automation or school project these are a bang for your buck. The dimension schematics and specifications are in the product images and description respectively so you can have a solid idea if they will be useful for the intended use. I used mine to automate the watering of some potted plants with an Arduino. As noted in another review the wires are very thin and depending on the usage it would be better to solder thicker (image) ones. Also there is a gap at the top between the wires and the case, so water might get in. These are definitely NOT submersible as there is a space near the bottom over the output tube where water might get in. The seller also discourages continuous usage so if your application demands that find something else. Overall these are great $3.25 pumps.

Works great though the power wires are very thin. The power wires are too tiny for even my smallest shrink wrap (which I use after I solder a larger gauge wire to the power wires). The only way to connect them seems to be to solder them to a larger stranded wire. The picture shows the stripped power wire next to 20 gauge bell wire. I would buy this again and I recommend it. just could be better.

Bought these for a school project so not like I had high expectations, and they still underdelivered. They're meant to sit in a small tub of water and when given power from a relay, send water through a solenoid valve. The first pump worked wonderfully and I was very excited. Until my code was executed again the next day and the pump was dead. I then tried to use the other 3. The first two of which, no matter how much I tried, would not even turn on. The last one turned on but was not pushing nearly as much water as the first and couldn't get through the solenoid valve. If you are trying to push through a valve, these might not cut it.

Great little pumps for my application in small battery powered fountains for moving water. But it makes a little more noise than I expected and spoils the tranquility of the water sounds.

My initial review indicated that 2 of the 4 failed within 12 hours, which is true. I was surprised to find that Gikfun sent me 4 more pumps shortly after posting my review. The 2 that worked out-of-the-box are still going strong, and I have to presume that 2/4 failing was an anomaly given the sellers confidence in replacing all 4. 5 stars for excellent and proactive customer service.

It’s good small and powerfully for testing