Does water ever gush out of a CWSC Vent/Expansion Pipe?

[WaterTight]

Back into CWSC.

And if so how rare?

Is it much more likely to drip?

Thanks

 

[lame plumber]

if the pipe set up is all wrong it will happily pump over all the time

 

[kozak1968]

It shouldn't pump over or drip if its been installed correctly.

 

[kris]

Cold water storage should never gush out the vent unless big problems are there,,, pumping over is more for your heating F n E tank ,
Even a dripping vent means your water is being heated at way to high a temp and indicates a problem with a thermostat, or sometimes cold water traveling back up through the hot water cold feed,

 

[lame plumber]

Cold water storage should never gush out the vent unless big problems are there,,, pumping over is more for your heating F n E tank ,
Even a dripping vent means your water is being heated at way to high a temp and indicates a problem with a thermostat, or sometimes cold water traveling back up through the hot water cold feed,

must read the thread better , still as Kris says, not right have a further look