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Open Roads Forum  >  Tech Issues

 > Automatic Changeover Regulator not changing over

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RKW

Four Corners, New Mexico

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Posted: 07/12/21 08:20pm Link  |  Quote  |  Print  |  Notify Moderator

My auto-changeover regulator will not switch sources once the first tank goes empty. The curbside tank will feed until empty, but the driver's side will not flow. I am forced to either lug the empty tank to the LP station or swap the full, driver's side tank over to the bay for the curbside.

OK check out my thinking on this: I can rule out the high-flow safety tank valve (on both tanks) as the culprit because either tank works fine in the curbside bay. True or false? If true, then would that would leave the regulator the most likely suspect?

Thanks for any help given.


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  • enblethen

    Moses Lake, WA

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    Posted: 07/12/21 09:25pm Link  |  Quote  |  Print  |  Notify Moderator

    My first guess is the valve thinks there is a leak in the line. There has to be some back pressure to the valve for it to stay open.


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    RKW

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    Posted: 07/12/21 09:29pm Link  |  Quote  |  Print  |  Notify Moderator

    enblethen wrote:

    My first guess is the valve thinks there is a leak in the line. There has to be some back pressure to the valve for it to stay open.


    Thanks. Do you know if the safety device that prevents the tank from flowing is located on the tank or in the pigtail?

    time2roll

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    Posted: 07/12/21 09:33pm Link  |  Quote  |  Print  |  Notify Moderator

    You are moving the lever to point to the other tank right?

    Otherwise yes I would replace the dual input regulator. I recommend the Cavagna brand.


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    RKW

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    Posted: 07/12/21 09:42pm Link  |  Quote  |  Print  |  Notify Moderator

    time2roll wrote:

    You are moving the lever to point to the other tank right?

    Otherwise yes I would replace the dual input regulator. I recommend the Cavagna brand.


    I'm confused. The lever need not be moved for the auto feature to work, right?

    time2roll

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    Posted: 07/12/21 10:07pm Link  |  Quote  |  Print  |  Notify Moderator

    The lever should point toward the cylinder you want to empty first.
    Yes no matter which way it is pointing the propane should flow until both are empty.

    Don't rule out getting new pigtails. They have a check valve that can get jammed up.

    RKW

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    Posted: 07/12/21 10:10pm Link  |  Quote  |  Print  |  Notify Moderator

    time2roll wrote:

    The lever should point toward the cylinder you want to empty first.
    Yes no matter which way it is pointing the propane should flow until both are empty.

    Don't rule out getting new pigtails. They have a check valve that can get jammed up.


    Thanks. I just ordered a new pigtail.

    enblethen

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    Posted: 07/13/21 06:29am Link  |  Quote  |  Print  |  Notify Moderator

    The valve I am making reference to is in the tank.

    Old-Biscuit

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    Posted: 07/13/21 09:34am Link  |  Quote  |  Print  |  Notify Moderator

    Which side is opposite where the Auto Change-Over Regulator is?

    Is that the cylinder that doesn't flow when other one goes empty?

    Red Top Regulator on cross over line has failed.
    It takes high cylinder pressure and controls it to 30# in line that goes across front of trailer
    *Required when long line is used otherwise if at full cylinder pressure the propane vapor could condense into liquid propane which will ruin your auto change over reg and if liquid gets into LP System it can ruin appliance gas valve

    RED TOP Reg has failed....not your auto change over reg.
    And YES the lever is for cylinder indication NOT for change over operation


    Is it time for your medication or mine?


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    RKW

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    Posted: 07/13/21 10:44am Link  |  Quote  |  Print  |  Notify Moderator

    Thanks to those who chimed in on this thread. The comments are appreciated.

    I did some more research and discovered that some pigtails, specifically those with the green knobs and sold by Camco, have a device located at the green knob that prevents a sudden large flow of gas in case of a broken gas line. LINK. It looks like mine is said Camco pigtail. I ordered a new pigtail and will replace the driver-side one. I'll post the results after I do this.

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