Just trying to make sure this is correct.
After the lines have been blown out, the pool service left the jandy valve with the main drain side closed.
This is correct?
If, by chance, the jandy valve was moved at some point over the winter, does that mean water could get into the main drain line, and if there was a freeze, crack the main drain line?
I'm asking because I've got a 4 year old and a 2 year old, and they could quite easily go up to the valve and touch it during the winter months.