Haven't had this happen before.....

[Snipe Hunter]

The LP change from liquid all happens inside the tank. Regulators have nothing to do with that.

Right but the gas pressure drop at the regulator can freeze the gas, frost up the regulator etc.

[Roly]

Right but the gas pressure drop at the regulator can freeze the gas, frost up the regulator etc.

There is a vent on the regulator , is it facing down ?     Unless the moisture is in the gas the gas will not freeze.   If the vent is frozen shut it will not allow the regulator to work properly, it can stop the flow.   When you compress a gas it heats up, think of a air compressor,  when it loses pressure it loses heat and can lower the temperature of the second stage regular and freeze the vent from moisture in the air.   Roly

[Stwood_]

There is a vent on the regulator , is it facing down ?     Unless the moisture is in the gas the gas will not freeze.   If the vent is frozen shut it will not allow the regulator to work properly, it can stop the flow.   When you compress a gas it heats up, think of a air compressor,  when it loses pressure it loses heat and can lower the temperature of the second stage regular and freeze the vent from moisture in the air.   Roly

Correct

[blackhat]

LP doesn’t freeze at temps and pressures normally experienced outside a lab or industrial type process. There are systems that use LP in the liquid state drawn from the storage tank. It essentially distributes as a liquid and is vaporized (boiled) at point of use. Uncommon in residential service.

Freezing of regs is a result of water contamination. Same deal with compressed air systems. Air doesn’t freeze, good thing when you consider breathing. 

A heat tape and an old blanket or similar is the preferred cure. Do everyone a favour and advise your supplier if it happens. They may not be aware they have a problem load of fuel.

[fredhargis]

A heat tape and an old blanket or similar is the preferred cure. Do everyone a favour and advise your supplier if it happens. They may not be aware they have a problem load of fuel.

Thanks, that device pretty much mirrors what my supplier said when I called. They didn't mention a bad load of gas, but will be adding methanol to my tank to absorb any moisture, and the heat tape/insulation was the temporary fix. Roly mentioned the vent...this particular regulator has a remote vent on it (a 3' or so hose that exhausts the gas away, presumably because there are some electrical conduits right next to the regulator) so when I wrapped it I didn't have to consider the vent....but that may be something to keep in mind if ait happens on a different regulator.