Quote Originally Posted by jester View Post
Ok so i am looking to upgrade from Gravity 1 to a gravity 3 and wanted to know if anyone had any ideas. Below is a layout of what i will do with a pic.

I will replace the current pump with a Jabsco pump that will fill and empity.

Add 3 more valves. One for each side and an extra one for adding another sac for surfing.

Wire the whole system up. Yet to be figured out but it is just wires and who cares if one bag fills when one is drainned.

I do not know if i would need to overfill holes / air holes. Would make it easy to see when the bags are full by the water flowing out the side of the boat.
Jester,
Get rid of the sprinkler valves. Two ways to upgrade. You can use 3 pumps to fill and three pumps to drain. Or you can use the Jabsco reversable pumps. They have their own valves in them so water will not drain out. If you go with the fist way that I mentioned, there is a few more steps than just adding more pumps and getting rid of the sprinkler valves. I have pictures of my install in my profile if you like to take a peak.
Tazz