I don't know if I would call this a "large fountain pump". I bought it for our fountain which is a medium fountain with a 4 foot lift height. The pump arrived and it looked kind of small, I was skeptical. It does work, and certainly for $23 it's worth it. Even if it only lasts a couple of years its worth it. I had a much larger pump, that this Sunterra pump replaced, which moved more water than this little one and it failed after 2.5 years (warranty 1 year). It was three times the price. The flow is a little weak for a 4 foot lift height, but it is adequate, and if it keeps working the way it does now, I would be happy with it.