Author Topic: Using 100 pound propane tank with 20 pound tank regulator  (Read 16871 times)

Offline nateo

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Using 100 pound propane tank with 20 pound tank regulator
« on: October 24, 2011, 08:14:54 AM »
Hi guys,
I have a Bayou Classic KAB4 burner, and a few extra 100 pound propane tanks. I have copper tubing and different flare fittings. Has anyone rigged up a big propane tank to run their burners? I'm not sure the best way to attach the tank to the regulator. My first thought was to cut the rubber tubing, use a barb fitting and a hose clamp to attach the copper tube to the regulator, but I worry about that leaking.

Any ideas?
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Offline Kit B

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Re: Using 100 pound propane tank with 20 pound tank regulator
« Reply #1 on: October 24, 2011, 01:10:36 PM »
I don't understand...
A 100# tank should have the same valve as a 20# tank...
It just weighs more, due to it's capability to hold more volume...
(100# vs. 20#)
Did I miss something?
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Offline Slowbrew

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Re: Using 100 pound propane tank with 20 pound tank regulator
« Reply #2 on: October 24, 2011, 01:14:39 PM »
IANAP (I am not a plumber) but that was my thought also.  The pressure in a 100# tank should be no different that in a 20# tank.

As always I stand ready to be corrected but the only difference I'm aware is the over damage you can do to your back due to 80 more pounds being moved.   ;D

Paul
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Offline nateo

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Re: Using 100 pound propane tank with 20 pound tank regulator
« Reply #3 on: October 24, 2011, 01:28:14 PM »
100 pound tanks don't have OPDs, AFAIK. They have the same internal, left-hand threaded valves that 4 through 40 pound tanks used to have, pre-OPD, not the external, right-hand threaded OPD valves.

Here is what an OPD valve looks like:
http://www.fropane.com/Web%20Content/OPD.gif

Here is what my valve looks like:
http://www.propaneproducts.com/index.php?l=product_images&p=476
« Last Edit: October 24, 2011, 01:31:05 PM by nateo »
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Offline Kit B

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Re: Using 100 pound propane tank with 20 pound tank regulator
« Reply #4 on: October 24, 2011, 01:43:52 PM »
I see...All the new ones I can see are OPD valves.

I use these, on my 20# tanks:
http://www.amazon.com/Mr-Heater-Pressure-Regulator-F273719/dp/B0002YQP76

They utilize the internal left-hand threads.
I get them for closer to $18, locally.
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Offline Slowbrew

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Re: Using 100 pound propane tank with 20 pound tank regulator
« Reply #5 on: October 24, 2011, 02:28:36 PM »
I believe OPD is required for residential gas grill type connections but the internal LH thread is standard for commercial/industrial type installs.  100# tanks are generally for commercial/industrial or at least home heating type installs so they would use the internal LH threaded connectors.

Paul
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Offline dean

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Re: Using 100 pound propane tank with 20 pound tank regulator
« Reply #6 on: October 24, 2011, 02:35:32 PM »
I agree with Kit B, your hose fitting should have "internal threads" that will screw over an adaptor fitting.  Or you could just cut the hose and fab your own fittings... LP is LP whether its in the delivery truck tank or in a 20 pound tank.   ;)

Offline Kit B

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Re: Using 100 pound propane tank with 20 pound tank regulator
« Reply #7 on: October 25, 2011, 06:25:17 AM »
I agree with Kit B, your hose fitting should have "internal threads" that will screw over an adaptor fitting.  Or you could just cut the hose and fab your own fittings... LP is LP whether its in the delivery truck tank or in a 20 pound tank.   ;)

I think you may have misunderstood.
The link I provided shows an adjustable regulator that would use the internal threads on his valve.
His valve:
http://www.propaneproducts.com/index.php?l=product_images&p=476

The threads furthest to the left , on the following regulator will screw into that valve:
http://www.amazon.com/Mr-Heater-Pressure-Regulator-F273719/dp/B0002YQP76
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Offline nateo

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Re: Using 100 pound propane tank with 20 pound tank regulator
« Reply #8 on: October 25, 2011, 07:42:07 AM »
I hadn't thought about replacing the regulator. I guess I was hoping for a cheaper/easier way to make the regulator I have work, although a longer hose and a different regulator wouldn't cost too much. I'll probably end up going that route.
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Online Jimmy K

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Re: Using 100 pound propane tank with 20 pound tank regulator
« Reply #9 on: October 25, 2011, 08:42:33 AM »
Many regulators have have threaded connections. Get some wrenches and remove the OPD connector and replace it with one that fits.
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Offline Kit B

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Re: Using 100 pound propane tank with 20 pound tank regulator
« Reply #10 on: October 25, 2011, 11:17:18 AM »
I tried adding something like one of these guys to my adjustable regulator, to make connecting easier...

It didn't work.
Evidently, many of those have built-in limiting orifices.
It choked my regulator so bad, that I couldn't get a flame..

But, you could probably add one of these to your current regulator:


http://www.campingworld.com/shopping/item/Excess-Flow-Soft-Nose-POL-x-1-4-Male-Pipe-Thread/24022/&?&affiliateid=3274&cvsfa=2734&cvsfe=2&cvsfhu=3234303232
« Last Edit: October 25, 2011, 11:22:28 AM by Kit B »
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