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 > New propane leak after tanks filled

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boatmanea

New Braunfels, TX

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Posted: 03/27/21 01:54pm Link  |  Quote  |  Print  |  Notify Moderator

I just had my two propane tanks filled after draining them nearly dry with the recent super-cold snap. When I reconnected them, there is a HUGE leak on both tanks right at the screw-in connection of the flexible hose connector along the hose where it goes into the "knob" to screw in. I do not see any cracks in the O-ring or assembly, dirt or debris in the threads, or any other obvious problem. Has anyone else had this? Could the cold have cracked both seals or hoses? Could the propane fill place have damaged the tanks? Hate to just buy new flexible hose assembly units if I'm missing something simpler.

azdryheat

Tucson, AZ

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Posted: 03/27/21 02:26pm Link  |  Quote  |  Print  |  Notify Moderator

I can't see where filling the tanks would damage them. I'd get new seals/O-rings and go from there.


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haste maker

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Posted: 03/27/21 03:05pm Link  |  Quote  |  Print  |  Notify Moderator

Put some Vaseline on the rubber o-rings


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Lynnmor

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Posted: 03/27/21 03:08pm Link  |  Quote  |  Print  |  Notify Moderator

Some pigtails don't last very long, check with soapy water and replace them if they are leaking.





time2roll

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Posted: 03/27/21 04:08pm Link  |  Quote  |  Print  |  Notify Moderator

If you are sure they are on correct, square and fully seated then I would assume you need new pigtails. Seems odd that both failed together like this. Do inspect for damage or have someone double check the connection for you before spending money.


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Boon Docker

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Posted: 03/27/21 04:36pm Link  |  Quote  |  Print  |  Notify Moderator

haste maker wrote:

Put some Vaseline on the rubber o-rings


Never use petroleum based products on rubber, use silicone based products.

Dutch_12078

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Posted: 03/27/21 07:22pm Link  |  Quote  |  Print  |  Notify Moderator

There's a rubber grommet inside the port on the valve with a brass center ring. Twice I've had inexperienced refillers damage them. One was damaged to the point that it fell out while unscrewing the refill nozzle from the cylinder, and the other had the brass center ring damaged enough that a POL or ACME connector could not seat properly. I was able to salvage the cylinders using parts from scrapped cylinders that had the same brand valves.


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SDcampowneroperator

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Posted: 03/27/21 07:59pm Link  |  Quote  |  Print  |  Notify Moderator

Boon Docker wrote:

haste maker wrote:

Put some Vaseline on the rubber o-rings


Never use petroleum based products on rubber, use silicone based products.
This - aka plumbers valve grease Not water, petroleum soluable or flammable.

Old-Biscuit

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Posted: 03/27/21 08:32pm Link  |  Quote  |  Print  |  Notify Moderator

Inside the ACME Nut

1) O-Ring that seals the connection between ACME Nut and Propane OPD Valve connection

2) Thermal Bushing where hose enters ACME Nut (melts if temps exceed 240*F which then allows the OPD Springloaded vlave to close stopping all propane flow)
*2 types of the thermal bushing

OLD one that was redesigned because it had high failure rate
NEW one that has better 'collar' around the bushing


This is the OLD one
[image]



This is the NEW one
[image]



In either case if leak is AT the ACME Nut to OPD.....check for missing O-Ring inside the ACME Nut
If leak s at the 'bushing'---new pigtails


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dedmiston

The West

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Posted: 03/27/21 09:22pm Link  |  Quote  |  Print  |  Notify Moderator

I would handle it like a tire. Add some detergent to a spray bottle and then spray everything to isolate the leak. And then deal with the leaking component.


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