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jgoofylizzard
Junior Nomad
Posts: 27
Registered: 8-19-2003
Location: Vancouver, Wa./San Felipe
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Yes I agree wornout....It only takes a minute to register so you can make a post..it would end all the childish anon posts.
Jo
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Dave
Elite Nomad
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Registered: 11-5-2002
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| Quote: | Originally posted by MrBillM
Advice for anyone installing a NEW stationary tank. Add a liquid fill valve if possible before the initial fillup. Then you'd be able to fill any
small tanks from your stationary tank. Look for tanks that have an additional Threaded fill plug to utilize. |
Please explain further. I've not found large tanks with an additional plug. Could you tap one in? Placement? Hardware\hoses\gauges needed?
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MrBillM
Platinum Nomad
Posts: 21656
Registered: 8-20-2003
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Mood: It's a Zip-a-Dee-Doo-Dah Day
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Tank Plug
I have seen numerous stationary tanks in the U.S. with an additional (unused) threaded plug. In fact, years ago, I had one out on the Mesa. I
haven't really looked at Mexican tanks in detail so it MIGHT be something difficult to locate, but it's worth a try if you are looking for a new
(unused) tank. If the tank has never been filled (they pressure test and fill with AIR only) you could drill and tap your own opening. If the metal
was not thick enough, you could even have a pad welded on.
Long-term it would be worth the effort.
One other possible solution on a new tank would be to remove the pressure relief valve and insert a tee. You could easily make up your own liquid
fill device by brazing the proper length copper tubing into a pipe fitting. In fact, you might have to make your own since Liquid fills are not legal
in many counties here in the U.S., including San Bernardino.
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Dave
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Posts: 6005
Registered: 11-5-2002
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| Quote: | Originally posted by MrBillM
One other possible solution on a new tank would be to remove the pressure relief valve and insert a tee. You could easily make up your own liquid
fill device by brazing the proper length copper tubing into a pipe fitting. |
Yeah, but we're not not talking about gravity fill here. Wouldn't I first have to shut the main then use high/low gauges?
Would a refrigeration kit work? I'm not familiar with the temps and pressure.
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MrBillM
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Gravity ??
Gravity ? I'm a little lost there. Propane in your tank is under pressure. The standard fill tube is short enough to take the GAS out of the top of
the tank. To get to the liquid, the tubing on your fill valve has to extend into the bottom of the tank where the propane is in liquid form. I did
an experiment with my existing tank and added a second valve off of the standard one to see how much propane I could put into a small (5 Gal/20lb)
tank. The amount was insignificant. Got through (1) BBQ. You have to get down to the liquid.
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Dave
Elite Nomad
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Registered: 11-5-2002
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| Quote: | Originally posted by MrBillM
Gravity ? I'm a little lost there. Propane in your tank is under pressure. |
The gas is, the liquid isn't. Those propane trucks use a pump to transfer the liquid. Unless you're talking about siphoning, wouldn't both cylinders
just EQ?
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MrBillM
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Pressure
All of the propane, gas or liquid, is under pressure inside the tank. That's elementary physics.
When filling small tanks from other smaller tanks, they turn the filling tank upside down so that the fill tube in the valve will be drawing on the
liquid rather than the gas. As far as Equalizing before filled, that will happen when the two tanks are of nearly the same capacity, but when you are
filling 5 / 7.5 / 10 gallon tanks from a stationary tank that is 300 - 500 litros capacity, the smaller tank will fill completely without a noticeable
drop in pressure on the filling tank.
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