If you have water escaping through the backwash port of your filter while the filter valve is set on backwash, then this is an indication that you have a displaced, worn or ripped spoke gasket in the head of the filter. This spoke gasket is supposed to be what separates the different zones such as backwash, rinse, waste, recirculate and filter from each other. The average pool owner can solve this common problem without the need of a service professional – and for only a few dollars in most cases.
