How to not use an aux tank in multi tank LPG system

Maybe something like this: http://www.ebay.com.au/itm/FORKLIFT-MAIN-SERVICE-VALVE-3-8-male-outlet-to-LPG-SERVICE-TAP-1110964-/272312144796
Just a simple shutoff valve. you would have one on the inlet and one on the outlet of your auxiliary tank. would that work?

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Originally Posted by abw

Maybe something like this: http://www.ebay.com.au/itm/FORKLIFT-MAIN-SERVICE-VALVE-3-8-male-outlet-to-LPG-SERVICE-TAP-1110964-/272312144796
Just a simple shutoff valve. you would have one on the inlet and one on the outlet of your auxiliary tank. would that work?

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Yeah, this is the sort of thing I'm after, but not sure the above one has the right fitting on both ends.