anyone know how to hook up a second gas tank

[chevJ40]

gday guys currently got a 60 litre gas tank under the back of ym 40 and its just not enough for a decent trip with a chev so thinking bout throwing a 110 litre in the back is it an easy thing to hook up or should i get it done professionaly
cheers
rob

[stool]

Get it done by a pro as it may need a enginerrs report as that is a shit load of LPG sitting inside the cab

[pcman]

legally it has to be done by a pro
you also need a proper 3 way vave thingo cant remember there proper name LOL

[Loanrangie]

The T valve is a hydrastat i believe, you only need this if the tanks will empty together otherwise just wire in another switch to flick from tank to tank via the lockoff's on each tank.

[chevJ40]

i was thinking of running the tanks seperatly as in run the tank to empty then switch to the other

[pcman]

The T valve is a hydrastat i believe, you only need this if the tanks will empty together otherwise just wire in another switch to flick from tank to tank via the lockoff's on each tank.

yep thats it hydrostat valve legally these must be fitted to a twin tank system i beleive


the lockoffs only stop flow 1 way so once the first is empty and you flick over to the second tank the pressure will equalise in teh first empty one and you will have 2 1/2 full tanks

used to happen in my 40 cause i didnt run a valve

[marin]

just had a thought, why can't you run a hydrostatic valve so that it is done legally, but then you hook up a switch that operates the shutoff valves at the tanks, so you can switch from one to the other? The valves would still be hooked to ignition, so they would still shut off when ignition is off.

marin

[RaginRover]

Stool and Co

no engineers report is needed, talk to an installer about how you would do it and then mount the tank yourself - and setup the external vent.

You will need the hydrastat valve (around $90 last time I priced one)
to stop the tanks filling each other as loanrangie described.

You can't really run the separately because there is only one input in the converter and you will need several solinoids @ around $45 each to make it work - easier to buy the valve.

Find an installer who will let you do the grunt work and finish the job and sign it off - all easily done - most are happy because they don't have to crawl under the car etc.

The difference between the tank in and out of the car is bugger all - follow the regualtions and it will be perfectly safe
Tom

[Loanrangie]

just had a thought, why can't you run a hydrostatic valve so that it is done legally, but then you hook up a switch that operates the shutoff valves at the tanks, so you can switch from one to the other? The valves would still be hooked to ignition, so they would still shut off when ignition is off.

marin

Correcto, this is how its done, i almost bought a disco which was switched tank to tank ( stupid for only 35 ltrs each). The hydrastat is a T so both tanks are plumbed to it with one outlet to the converter and the lockoff's stopping flow of either tank whichever is selected. Looking at a lockoff, i doubt they could flow backward maybe the vacumm type could.