Bought 2010. 2 Yrs later pump sloooowed  it's output. I ordered a couple extra pumps. Found out it was MY MISTAKE  for not taking pump apart and cleaning properly! OOPS... Now cleaning and pump never reduces output. Reading the instructions recommended/ I purchased a pump because I failed to clean properly. 4 cats will not drink out of static water bowls ever so a 360 fountain will always be in my home as long as there is a cat. 1 drawback: Many many more urine lumps to clean out in litter box. No dehydrated cats in this home. BUY 1 TODAY !!