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Old 08-05-2015, 11:39 AM   #1
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30 lb to 40 lb propane tanks - Question

When I bought my 99 Excella it had one aluminum and one steel propane tank, both 30 lb. Since they were different heights the tie down would not work properly. Last year I ran across 2 used 40 lb aluminum tanks so I purchased and installed them. The only thing I did was to extend the tie down rod. The rubber hose that runs between the regulator and the copper tubing was a stretch, but it worked.

This year I noticed the pigtails are starting to get stiff with age and starting to show some deterioration. They have a tag showing date of manufacture was 1999. I assume the regulator is original also. I've decided it is time to replace the 16 year old regulator and flexible hose.

My questions are regarding the 1/2" flexible hose between the regulator and the copper pipe. The original hose on the trailer is ~36" long, the one that came with the 30 lb tanks. It seems to be in tension now, maybe too much. If the trailer would have originally had 40 lb tanks, what length would this hose have been? Should I install a longer one? Anybody have a part number? (there is none for 40 lb tanks in my manual for this year)

Thanks for any suggestions!
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Old 08-05-2015, 11:43 AM   #2
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I have original Worthington #40 aluminum tanks. My regulator is situated at the bottom of the tanks. My pigtails are 36".
Any hose shop will re make the pigtails reusing the ACME nut and other fittings. Should cost you $15-20 tops!
Also search for my recent post regarding non calibrated but brand new regulators!
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Old 08-05-2015, 11:46 AM   #3
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Quote:
Originally Posted by A W Warn View Post
My questions are regarding the 1/2" flexible hose between the regulator and the copper pipe. The original hose on the trailer is ~36" long, the one that came with the 30 lb tanks. It seems to be in tension, maybe too much. If the trailer would have originally had 40 lb tanks, what length would this hose have been? Should I install a longer one? Anybody have a part number? (there is none in my manual for this year)

Thanks for any suggestions!
You don't want too much line. But if 36" almost worked, then 48" seems like a reasonable length, leaving you a bit of slack.
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Old 08-05-2015, 11:55 AM   #4
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Quote:
Originally Posted by AtomicNo13 View Post
I have original Worthington #40 aluminum tanks. My regulator is situated at the bottom of the tanks. My pigtails are 36".
Any hose shop will re make the pigtails reusing the ACME nut and other fittings. Should cost you $15-20 tops!
Also search for my recent post regarding non calibrated but brand new regulators!
I had not thought of mounting the regulator lower and using longer pigtails.
That might work.
Already read your post. I will be measuring the water column with the appliances operating. Thanks!
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Old 08-05-2015, 12:02 PM   #5
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Keep in mind, the lines are high pressure lines, so they need the inner liner, if you're having them made, have ptfe sealant smeared on the ends to seal them. Also renew the bigger flex live between the regulator and hard copper line. I think the oil causes a delamination.
I just assumed all regulators were at the bottom of the tanks!
Good luck!
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Old 08-05-2015, 12:10 PM   #6
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Keep in mind, the lines are high pressure lines, so they need the inner liner, if you're having them made, have ptfe sealant smeared on the ends to seal them. Also renew the bigger flex live between the regulator and hard copper line. I think the oil causes a delamination.
I just assumed all regulators were at the bottom of the tanks!
Good luck!
Yeah, do not use the "tape" alone. I use the yellow tape and smear with the paste for "gas" plumbing.
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Old 08-05-2015, 12:13 PM   #7
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Quote:
Originally Posted by AtomicNo13 View Post
Keep in mind, the lines are high pressure lines, so they need the inner liner, if you're having them made, have ptfe sealant smeared on the ends to seal them. Also renew the bigger flex live between the regulator and hard copper line. I think the oil causes a delamination.
I just assumed all regulators were at the bottom of the tanks!
Good luck!
Both of my trailers have propane bottle covers. The regulator in them are mounted high, I assume, to allow for access to the automatic change over valve. After more thought, I would like to keep the regulator in the original position.
I think the suggestion to get a custom made hose would be better, unless someone who has 40 lb tanks on a trailer similar to mine comes through with a measurement or part number.
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Old 08-05-2015, 12:16 PM   #8
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Yeah, do not use the "tape" alone. I use the yellow tape and smear with the paste for "gas" plumbing.
CWF,
We have the same trailer. Do you have the original 30 lb tanks?
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Old 08-05-2015, 01:37 PM   #9
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CWF,
We have the same trailer. Do you have the original 30 lb tanks?
Yes! 30# aluminum with remote electric "gauges".

I replaced the valves and recertified last year. Bought one additional with gauge last year, too.
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Old 08-05-2015, 02:38 PM   #10
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My 75 Overlander has 40# tanks, not original. From the bottom of the regulator is a 6" pipe nipple, the bottom hose is connected from that to the soft copper that runs under the belly (on the outside). The all-thread on the clamp has an extention. The individual tanks have two pins each to use at the botttom to help hold them in the rack.

When we got it, the pig tails were stiff, and the bottom hose slightly stiff. I mounted the regulator to the clamp down bracket facing forward and added elbows to the gas inlets to reduce stress on the pig tails. Then ordered pigtails of the appropriate length, in this case 12". For the hose from regulator to soft copper, 3/8 MPT on one end and 5/8 Flare on the other, 24 inches long, I could only find an identical hose, nothing longer, so the pipe nipple stayed.

Next for gas is a tank cover.
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Old 08-05-2015, 02:47 PM   #11
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Here is pic of the stamped collar:
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Old 08-05-2015, 04:08 PM   #12
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Yes! 30# aluminum with remote electric "gauges".

I replaced the valves and recertified last year. Bought one additional with gauge last year, too.
My trailer originally had the gauges with sensors like those shown in your photo, but no longer.
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Old 08-06-2015, 12:03 PM   #13
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Why not fabricate an extension with copper tubing??.....something you can install on either end of the hose.

Tom
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Old 08-06-2015, 12:07 PM   #14
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Watch out for pressure vessel certification on older tanks, can run out of date
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