The OEM pump that came in my C was, I would assume, as cheap as they come. I can't remember exactly why, but I decided to upgrade it before it died (and keep it on hand as a spare). I went with a variable speed pump that was fairly expensive. It was a NIGHT AND DAY difference. With the OEM pump, I wondered if other people at NP campgrounds thought I had my generator on! I'm sure it wasn't that loud outside, but it felt like it from the inside. The variable speed pump is just so much better - primarily from a noise perspective. I like that it ramps up and down rather than the jolting on/off of the cheapo. I want to say I spent a couple or few hundred bucks at CW for the new one? Not sure - it's been a few years...
