i do,they might rust but just change them.
those have been iin a sealed tup for a year or so.
sometimes underwater but not always under.
not sure if they make ss ones
I read the thread, it was very interesting. Anyways, I should have been more clear, I was talking about heat transfered to the water, not the temperature of the pump motor. I know from personal experience that throttling back a submersible pump too much WILL create tons of heat! With external pumps the heat transfer is minimal in any case, so...