PM01

seems to work well. I was a bit concerned about it. I placed it in some a wading pool that catches rainwater for some plants and find it keeps the water at the level I need it by placing it on a container the depth I need the water to be..

hard working little pump. 5 feet is right....buy bigger one if you need to go distance. will not pump thru a check valve

The pump is small and does its job well for draining condensate automatically, especially with the built-in level sensor. It took a little adjustment to get everything positioned correctly, but once set up, it runs reliably.

It runs, it pumps when the sensor is touched, it turns off... Then the water left in the tube that didn't get pumped out flows back into the container, triggering the sensor and the pump to start running again. There should be a backflow valve included because the pump never actually turns off. The 12 inches of water in the outflow pipe just goes right back into the container when it stops.

The sensor does what it is supposed to do and starts the pump when the water level is about half way up the pump sides. The problem is (at least on mine) there is a vent hole in the top of the pump--apparently to allow rising water level to push the air out of the pump impeller so it will prime and pump. But the pump also sucks air down thru the vent hole as soon as it starts pumping. So it is pumping both air and water which reduces the volume of water pumped and reduces the height the pump will pump. If you put your finger over the hole while pumping, the air in the line goes away, the volume increases and the the pumping height goes up. Also when the pump is fully submerged the vent hole would be covered and it would not suck air, but since the sensor is below the top of the pump, the water level will always drop below the top vent and it will end up sucking air. It needs a check valve that will close the vent when the pump starts to suck. I'm wondering if I can put a little flap of thin rubber over the hole that will allow the air to vent when the water rises but close when the pump starts pumping water. The pump has possibilities but it was like they quit working on the design before it was finished. The instructions if I unterstand the meaning says the outlet needs to be higher than the pump to keep it primed but it doesn't seem to make any difference whether it's higher or lower than the pump. Maybe the water draining back into the pump is supposed to raise the water level enough in the reservoir to keep the pump impeller covered? Doesn't matter as long as the top vent is open it still sucks in air. The pump as designed is self defeating. Also further investigation reveals the pump leaks substantial water out at the seam between the middle and lower sections

Bought one for hot tub cover clearance - worked perfectly for many months (small, powerful and love the integrated sensor/switch). Switched it to an HVAC condensate overflow guard - I think it works there. Bought a second one to put back on the hot tub cover. Doesn't pump water. If you blow hard (with your mouth) into the intake port & then put it into water it will pump fine, but once stopped, it fails. Such a pity - solved a tough problem really neatly and effectively the first time, failed the second. Couldn't find ANY way to contact the manufacturer off Amazon site - all links just lead to Amazon dead ends, not the manufacturer. Too late to get a refund or replacement. 16% 1* reviews - come on Amazon! This manufacturer has a great product and way too low quality! :(

Pump works great!!

I have a patio drain that is clogged downstream and drains very slowly. This pump fits perfectly down the 3inch drain pipe so that it can pump rainwater out. It isn’t fast, but it clears standing water after a rain within 24 hours and then automatically shuts off. Not a permanent solution, but works for now. Others complained that the output tubing gets crimped in shipping. Running some warm water for a couple minutes fixes that. If you need more length just buy some clear 5/16th tubing on Amazon. Also, after the pump shuts off the backflow of water in the tubing may cause the water level to rise sufficiently to cause the pump to restart. This is easily fixed by adding a 5/16 inch one-way check valve to the output to prevent the backflow. Just be sure the backflow valve does not require a lot of pressure to open. Cheap one-piece plastic ones create too much back pressure. I went with a metal one that could be disassembled so that the valve spring tension could be reduced.

Ass