I've got a 16500 gallon in ground pool that I've been having issues with lately. The latest issue is that my pool will begin flushing water down the backwash even though it is set to Filter. I took the Vari-Flo valve in for service and they replaced the spring and an O-ring, the spider gasket was fine. Came home, put it back together and fired it up. All seemed to working well, moved on to other chores. About 15 minutes later I heard gurgling from the pool. The noise was caused from the now low water level in the pool pouring into the skimmers. I checked the pump and sure enough water was running through the backwash lines. I shut off the filter, tried changing it to backwash and running it, to rinse, then back to filter. Same thing.... I'm wondering if it's possible that there is an obstruction in the filter line and when the pressure becomes to great it forces the water into the backwashing lines? Any advise/suggestions are appreciated! Thanks,
-riley
-riley