So we were discussing the pool installation with the builder that is putting up our home.. We are having a pool company come in to do the actual pool install but are using the plumber and electrician from our builder for all the runs between house and filter/heater. Anyway, we were discussing what was going where and the plumber noticed that a "backflow preventer" was put down on the permit application from pool store.. He asked if I was installing an automatic water filler which is something I didn't even know about.. I never discussed it with my pool company and it was never something we talked about doing.. The plumber then advised that the backflow preventer would be needed if I was running a water line to the pool.. I told him that we didn't have any intentions of running a water line and we were just doing the standard pool install with the exception of the heater.. So I guess there is a new decision for our pool install.. Is it worth getting an automatic pool filler? I am thinking that the water level wont drop that much but we haven't had a pool before.. I am thinking that worst case we can just drag the hose to the pool to top off when needed, but if its something that will be a weekly event then it might be worth it to just do the auto filler.