Linking Fat Sacs Together

[toomuchhype]

Hey all,

I'm wanting to link my two fat sacs in my VTX together for surfing. I have a 750lbs Fly High in the rear locker, and want to purchase and add the 370lbs tube sac for under the seats. I will be plumbing in the 750 lbs sac, and I'm wondering if I can link the two bags together, so that I can flip one switch and it will (albeit rather slowly) fill up both sacs for surfing.

I have it drawn out in the image below. My question is, will the #3 line allow me to both fill and drain the 370 lbs sac? Will this layout leave a fair bit of water in the 370lbs before the pump starts sucking air from the 750lbs? Any other suggestions how I might be able to pull this off (1 pump to fill both bags, 1 pump to drain both bags)?

Thanks

[liljohn]

That will not work. If you want only one pump go jabsco and the loose the vent line. If you want a fill and drain pump you will need to plumb each bag independently.

[CRASH]

Hey all,

I'm wanting to link my two fat sacs in my VTX together for surfing. I have a 750lbs Fly High in the rear locker, and want to purchase and add the 370lbs tube sac for under the seats. I will be plumbing in the 750 lbs sac, and I'm wondering if I can link the two bags together, so that I can flip one switch and it will (albeit rather slowly) fill up both sacs for surfing.

I have it drawn out in the image below. My question is, will the #3 line allow me to both fill and drain the 370 lbs sac? Will this layout leave a fair bit of water in the 370lbs before the pump starts sucking air from the 750lbs? Any other suggestions how I might be able to pull this off (1 pump to fill both bags, 1 pump to drain both bags)?

Thanks

We have that exact system on our 2000 lsv with the exception of the vent. You will push all the water out of the vent no matter how high you run the hose if its hooked to the 370. I fill the 370 first then it overflows into the 750. It works fine and almost completely drains with the drain pump inthe 750 bag.

Edited September 22, 2011 by CRASH

[liljohn]

We have that exact system on our 2000 lsv with the exception of the vent. You will push all the water out of the vent no matter how high you run the hose if its hooked to the 370. I fill the 370 first then it overflows into the 750. It works fine and almost completely drains with the drain pump inthe 750 bag.

Seriously? I ran my vlx like this last year and it sucked. I could never get the baggs to fully empty.

Edited September 22, 2011 by liljohn

[toomuchhype]

We have that exact system on our 2000 lsv with the exception of the vent. You will push all the water out of the vent no matter how high you run the hose if its hooked to the 370. I fill the 370 first then it overflows into the 750. It works fine and almost completely drains with the drain pump inthe 750 bag.

Crash - do you vent your 750 sac? Or are you saying venting any of the sacs (regardless of sequence) would push the water out?

Interesting feedback.. Sounds like the votes are divided so far - anyone else try this?

[CRASH]

The 750 has the vent /overflow. Been in there for over 3 years going strong so far.

[Wake My Day]

I have to agree with liljohn. I had the piggy back system, and filling worked, but draining the sacs really sucked. This system always left lots of water in the bags. I had to change to Johnson reversable pumps. System works like a dream now.