Can anybody explain how a main drain with a hydrostatic valve operates these are my concerns.
1. pool drainage from excessive leaf build up.
2. Whin winterizing I never have blown the main drain out but install a 4 foot ruber hose sealed at both ends per instructions from manufactory. I have never had any problems but it makes me nervous through the winter as the temps drop below o. Can you blow the lines out of a main drain with a flapper valve and if so what would be the recommendations. Like I said I have had no problems but I just think about this all winter.
I would really like to know how these hydrostatic drains work i cant seem to picture this in my little brain.
Thanks Ric W