Berg,

Here's the link to my install.

https://forum.moomba.com/showthread....allast+upgrade

Be sure to look at the pics on pg 5 also.

I went with one, 1" intake feeding two T-800's and one stock Rule 2000 (acutally a 1200gph pump). Here's the deal on the auto fill, auto drain issue. If you don't use valves or vent loops, the rear sacs will usually auto drain, but will not auto fill. The front sac will usually do both - auto fill when sitting, auto drain when underway.

So my solution was to install brass swing check valves for the rears (cheaper than plastic check valves and less restrictive) at about a 45 degree angle and an Irritrol electric valve for the front. I don't have any auto filling or auto draining issues with any of the bags. And I solved the auto drain thru the drain fitting on the rear surf side sack by routing the vent hose as high as possible, higher than the vent fitting on the bag. As long as that is the case, the water will not auto drain out the drain fitting.

Hope that helps.