I would say to contact the guys at www.wakemakers.com
They have been very helpful with my system. I own a 07' Moomba and had the sprinkler valve system. Boy did I hate that. I removed all the valves and purchased a vented loop system from them I ordered 3 loops and 20' of extra ballast hose. Now that I am finished, and still need to test, I have the exact same set up as a Malibu boat. I also upgraded my scuppers. I went from 1 3/4" scupper to 3 1" scuppers. I am using one for each bag that I have. I also took out the single 500gph pump and installed 3 Tsunami 1200gph pumps. Here is a link to my post http://moomba.com/msgboard/showthread.php?t=7138 http://moomba.com/msgboard/showthread.php?t=7992
As you can see from the post, I ran into a few difficulties. I really hope that with this new system, that everything should work fine.
(Message edited by tazz3069 on July 04, 2009)