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Open Roads Forum  >  Tech Issues

 > Replacing a propane pigtail

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waynefi

S E Michigan

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Posted: 08/07/19 03:14pm Link  |  Quote  |  Print  |  Notify Moderator

The pigtail to one of my propane tanks has cracks in the hose, so I want to replace it.

When I put in the new one, it flunks the soap bubble test. There are bubbles between the brass fitting on the end of the hose and the brass fitting on the regulator.

The new one’s package reads “RV Thermo Pigtail 1/4” Inverted Flare”.

If I switch back to the old one, it works fine.

Is there some trick to changing these?


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MDKMDK

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Posted: 08/07/19 03:33pm Link  |  Quote  |  Print  |  Notify Moderator

Not sure. Why not take it to your local Blue Flame or other propane shop and ask them? I've used the BF shop guys before to make up custom hoses and parts for me. They're great.


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Old-Biscuit

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Posted: 08/07/19 05:45pm Link  |  Quote  |  Print  |  Notify Moderator

Instead of a 'flared fitting' I would imagine your LP Reg needs an 'Inverter' fitting


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BB_TX

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Posted: 08/07/19 05:57pm Link  |  Quote  |  Print  |  Notify Moderator

There are at least two different type fittings. Years ago I replaced my high pressure regulator valve and the old pigtail would not fit it. Had to take the fitting from the old regulator and install it on the new one. You might be able to buy an adapter. Check your local well equipped hardware store.

time2roll

Southern California

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Posted: 08/07/19 07:44pm Link  |  Quote  |  Print  |  Notify Moderator

Do the fittings look identical in shape as to the mating surfaces that seal together? That is the replacement hose should look identical to the old hose.

Use no sealant tape right?

I believe most common is the inverted flare but some could be NPT threads.


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mobeewan

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Posted: 08/07/19 08:15pm Link  |  Quote  |  Print  |  Notify Moderator

IIRC inverted flare uses straight threads.

I stopped buying pre-made pigtails. Whether they have a pipe thread or reverse flared end both ends of the hose use crimped fittings with barbs. I always had problems with propane leaks between the hose and the fitting. Especially when the hoses got stiff in the winter time and I was switching tanks. The hoses would always rotate a little on the barbs because they were so stiff. I now get my hoses made at a local industrial hose supplier. I took the reverse flare fittings out of the regulator and put in pipe threaded by 45 degree flared elbows and bought green acme nut fittings with male pipe threads on them.

The hoses I have made have a female 45 degree flared swivel on one end and a female pipe thread on the other end. Although they have the same internal diameter, the hoses are a little fatter and the crips are a lot tighter. No more leaks or hoses rotating on the crimped hose barb's.

waynefi

S E Michigan

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Posted: 08/07/19 08:20pm Link  |  Quote  |  Print  |  Notify Moderator

time2roll wrote:

Do the fittings look identical in shape as to the mating surfaces that seal together? That is the replacement hose should look identical to the old hose.

Use no sealant tape right?

I believe most common is the inverted flare but some could be NPT threads.


Yes, the old and new ones look identical. No sealant tape.

The box the new one came has no instructions at al about screwing it in.

time2roll

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Posted: 08/07/19 09:18pm Link  |  Quote  |  Print  |  Notify Moderator

Should not be any trick to it. Snug it up firm and it should seal.
Possible defective.

I recommend Cavagna brand for a superior crimp.

https://www.rvplus.com/lp-gas/pigtails-gas-hoses-and-accessories/pigtails/

Verify part number on page 90

waynefi

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Posted: 08/13/19 09:52am Link  |  Quote  |  Print  |  Notify Moderator

I took the leaky one back and exchanged it for another of the same brand. It also leaked. So I returned that and ordered from Amazon. That one does not leak.

The original, from an RV dealer, cost $30 for one, and leaked. From Amazon, it was $15 for two, and no leak.

dougrainer

Carrolton, Texas

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Posted: 08/13/19 10:51am Link  |  Quote  |  Print  |  Notify Moderator

Usually the Pigtails that have a round crimp ring will leak. You want the compressed fitting. The link shows the best crimp. Doug

https://www.walmart.com/ip/Camco-Olympia........_jaeA5AIVSb7ACh1S_QpZEAQYAyABEgJ5hvD_BwE

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