Quote Originally Posted by Charlie_R View Post
I would assume that since you don't get extended periods of below freezing temps there that you would be ok without blowing the main drain. Your frost line would be very shallow, on the order of only a few inches, if that. As you stated, your water level is well below the ground surface. I doubt that you even get much ice in your pool, let alone in the pipe from the main drain.
Thank you for the feedback. You are correct, we don't get much ice in the pool.

Perhaps what I might do is close the main drain valve so that the water level in the line won't rise in case accumilating rain/snow on the cover pushes the pool water level up (I try to keep water pumped off of the cover).