The pump is one thing.
But decent hose is the other. I was kinda shocked at how nice
the rental hose was. For a decent hose, you could pay 7x for
the hose needed (150 feet), compared to the cost of the cheesy pump.
When I got the rental pump and hose, the hose was suction
compatible (won't collapse under suction). And that hose
design allows the pump to run at closer to its rating.
The one thing I didn't get with the pump, was any extra fittings.
To pump water out of a yard, I needed a 90 degree angle fitting,
with (some sort of) standard fitting on the end. I went to the
Pump House (commercial) and they gave me one for free (as they
had a stock of junk). With the ninety degree, that prevented
the hose from getting kinked. If pumping a basement, with a
hose that rigid, a 90 degree fitting might still be needed.
For home usage, I have inadequate hose ("lay flat" non-suction
hose), which requires extra pumping time. Turning a two hour job
into a day long job.
Pumps with impellers, have to sit closer to what you want to pump.
Partially submersed (or for a good pump, totally submersed
and by a significant number of feet). For $500, you can get
a cast iron pump, just toss it into the water and ignore
it, it's that robust. But many other home pumps, you need to
be more careful with them, to not ruin them on the first go.
Suction pumps with a piston, if I bought and paid for one of those,
I'd be careful about what kind of water I'd feed it, to protect the piston.
A piston pump could sit at grade, and a suction line run down into the
water.
Pumps have a max inlet operating temp, and a pH range, but this
isn't usually an issue for a basement thing. The little pumps
rely on the flow of water around the pump jacket for cooling.
If the pump burns 500W, and the motor is decently efficient,
there's still a good amount of waste heat. Pumping cool water
is what it wants to do.
The motor on some pumps are oil cooled. Oil held in the motor
winding area, acts as a thermal bridge to the internal jacket,
so the passing water can carry away the heat. The very first
pump I bought, the pump had been stored on its side in the
hardware store, and all the oil had run out. (This risks
destroying the motor on your very first usage, as the motor
will overheat without the internal oil fill.) The Pump House
had a bottle of oil suited for the job, and I refilled the
pump jacket before usage. If the cardboard box a pump comes
in, is soaked in oil, you've got a problem.
For home hoses, you clean them after using them, so they
won't stink on storage. One of the reasons I don't use the
2" line very often, is the cleaning and rolling procedure
is a back-breaker. If you had an assistant, it would be not
nearly as bad.
There are *many* advantages to renting :-) For a once in a lifetime
burst pipe, you don't need to own the stuff. What *owning* the
items does for you, is in times of overland flooding, you
might have something you can use, when the rental is "all out".
Paul