Quote Originally Posted by jmvotto View Post
Its a different pump, but i think it pumps as much or more water than the stock fill pump. the propriety adapter is a little pricey though. I have seen a couple people heat the hose and muscle it on the fitting... LOL
The stock fill pump on the older GIII system is called a "Rule 2000" but it is rated as a 1200 gph pump. The Tsunami is also a 1200 gph. Lots of folks on here think the Rule one moves just a little more water but, when you start putting 3 of the Tsunamis in, the difference is negligible and the cost difference is worth it.