Our auto filler is tied to our 40 year old sprinkler system. As we have replaced valves, lines and heads in the sprinkler system the auto fill has sunk into the ground (it's in the yard, about 2 feet out from the pool deck) and now it doesn't keep the pool at the proper level. Filling with a hose doesn't help, I think the overflow valve is in the autofiller. We had a skimmer leak fixed recently and the repair guy said there was no leak in the auto filler. Suggestions or ideas on how to fix? Does the auto filler need to be in concrete? Thanks!