I am running the pump submerged.... I have it mounted so its suspended in the water its not touching anything. I am actually running it 12volts now and in my case my power supply fan is louder than the pump. So no its not as noisy as you guys say it should be. This is a general motors pump from ur local autoparts store. I am testing it right now... so far so good running and no leaks I'll take pics for you guys as soon as i get a chance.
Compared with my ac pump i was running, which was 96 gph with a 12" head, this pump flows i'm guessing almost twice that. And from what I am seeing it is not putting much heat into my resovair water.
