I bought this pump for 1000 rubles in order to attach a battery to it and use it as a portable device for pouring water into a bucket from a well. But some difficulties arose. :)
These pumps are designed for pumping diesel fuel, kerosene and water. They come in two sizes - 38 and 51 mm in diameter.
Small pumps up to 12 liters per minute, large up to 32 liters per minute. There are options with a 12 and 24 volt power supply, as well as with a cigarette lighter connector or clothespin contacts on the battery terminals.
I ordered right here 12-volt 51mm pump with clothespins.
The pump has a strong chemical odor. Over time, it partially erodes.
Power consumption and current were not specified anywhere. I assumed that the pump consumes no more than two amperes, but I was wrong. Without water, the pump hummed and consumed about 1 ampere. I connected it to the 2A power supply, lowered it into the water and the protection immediately triggered at the power supply. I was surprised to plug in a 5-amp power supply, but its protection worked too. It turned out that the pump consumes a little more than 7 amperes! That is, its power is about 100 watts. This was the first surprise.
The second surprise awaited me when I connected a hose to the pump, lowered it into the well and turned it on. The water was boiling, but the pump was not pumping anything. It turned out that the high pressure from the pump kicked out the lower part together with the filter and it drowned in the well. Apparently, it was simply inserted into the pump body and not secured in any way.
I pumped out the entire well and even saw a part of the pump that had fallen off at the bottom.
At the very first attempt to scoop it up with a net on a three-meter handle, it swam away somewhere and disappeared. I spent another hour fumbling along the bottom with a butterfly net, but I never found it.
I had to "farm" a new bottom for the pump from a plastic bottle of vitamins.
Just in case, I fixed not only the lower, but also the upper part of the pump with reinforced adhesive tape - otherwise it would suddenly fall off too.
The pump is equipped with a wire 240 cm long. A switch is installed at a distance of 137 cm from the pump.
Outlet pipe diameter 19 mm (inner diameter 13 mm). A 3/4 "garden hose fits just fine.
This is the flow of water that the pump gives through a 3-meter hose from a depth of 1.5 meters.
For the sake of experiment, I connected the pump to the country water supply system. After a 10-meter HDPE pipe of 25 mm, the flow is not so big, but the water is pouring out.
And even after the subsequent 7-meter HDPE pipe 20 mm and several turns and tees, water flows.
But from the tap in the kitchen (this is another 4 meters HDPE 20, a check valve, 16 metal-plastic and a storage water heater), as expected, the water no longer flows. There is not enough pressure.
For the lower part that fell off, I received $ 5 from the seller in a dispute. If you buy such a pump, you need to immediately glue this part well, and it is better to fix it with reinforced tape on top, just in case.
Three high-current 18650 batteries can be used to power this pump (2600mAh batteries will last for approximately 20 minutes of operation).
© 2021, Alexey Nadezhin
For ten years I have been writing every day about technology, discounts, places of interest and events. Read my blog on the site ammo1.ru, v LJ, Zen, Mirtesen, Telegram.
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