I bought this today and it's my first DC variable speed programmable pump.
but it's a cheap one at $130 plus tax at the LFS. I bought a slightly smaller one from chewy today for about $60 plus tax and it will be here in a couple days.
This one is the 4000 model and will push about 250 gph at 2 feet of head. 1050 at zero.
Right now I'm running it submerged and just pushing it through a 5/8 garden hose from a 3/4 barb fitting, and it also comes with a 1-inch barb fitting and has national pipe thread in and out. All the fittings have O-rings including the pump chamber itself, which will come off and rotate once you slide off the base plate.
It has a digital controller but the programming instructions are very sparse and the engrish is particularly wanting.
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It took a little fiddling to figure out how it runs. First there is no power switch and when do you start it up it starts pumping immediately (unless you don't get it all plugged in perfectly and then you get an error message.)
I immediately got an error-07 but there is no description of what error messages mean in the "manual." I guessed right the first time though. Check the plugs.
That installation, maintenance, troubleshooting, and operation manual (including performance charts and warranty card ) is slightly larger than a playing card. Get out your magnifying glass.
I could turn the speed controller no higher than 3 of 20 before it started to overwhelm my drain. That was never close to possible with the old pump.