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Old 23 April 2012, 12:07   #1
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Fitting a portable fuel tank

Thoughts please as I want to fit an extra portable fuel tank to my under deck Tank, I want to be able to plug in a portable tank as a back up or to extend my range!
I was thinking of adding a shut off valve to the existing fuel line
A. to stop fuel draining from the portable tank to the main.
B. if I want to run off the portable I need to isolate the main tank.
C. If I want to run of the main open tap & disconnect portable tank.

First drawing shows as it is second shows how I plan to set it up, any comments?

Great drawings I know & yes my fuel bulb dose piont down which is a pain!!
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Old 23 April 2012, 12:43   #2
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Don't put a portable fuel tank in an unvented locker.

If your fuel filter is filled with sediment or water your portable won't work too. Ditto if your primer bulb cracks. So I would have a completely seperate fuel line and just swap them when you want to switch tanks.
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Old 23 April 2012, 12:59   #3
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Fit an 'L-port changeover valve' in place of the hose connector from your main tank on the filter head and run the feed pipes from each tank to this valve.
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Old 23 April 2012, 13:22   #4
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i like the pictures, better than i could do

just out of interest, what's a 'L-port changeover valve' ?
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Old 23 April 2012, 13:54   #5
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Quote:
Originally Posted by captnjack
Don't put a portable fuel tank in an unvented locker.

If your fuel filter is filled with sediment or water your portable won't work too. Ditto if your primer bulb cracks. So I would have a completely seperate fuel line and just swap them when you want to switch tanks.
Yes I can see your point, I could plum it in after the fuel bulb & have a separate bulb on it as the portable take is less likely to suffer from water!
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Old 23 April 2012, 14:13   #6
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Quote:
Originally Posted by Chris Caton View Post
what's a 'L-port changeover valve' ?
One of these:

L Port Valve 1/4" BSP

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Old 23 April 2012, 15:06   #7
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Quote:
Originally Posted by Downhilldai View Post
One of these:

L Port Valve 1/4" BSP

i see where your coming from now, but the description says: "The L port configuration allows one threaded female port to feed in, and two threaded female ports to feed out, which can be operated one at a time, but not together" does it also allow you feed the opposite way, two ports in, but one at a time and one port out?
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Old 23 April 2012, 15:28   #8
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I have these on my fuel water separator so it's a quick change over

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Old 23 April 2012, 15:44   #9
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I have these on my fuel water separator so it's a quick change over

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looks like a good idea, guess i'm gonna be having a look at that setup this weekend
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Old 23 April 2012, 15:44   #10
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All my tanks are external, not lucky enough to have anything in built but best to keep everything separate as much as possible as you don;t want a problem with one section effecting both tanks.

I have a Y splitter with dual taps and each line has it's own bulb and tank connector so it's easy to change tanks etc with no fear of a pipe or connector failure causing an issue with the other tanks.
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