Abstract: A temporary plug apparatus for use to seal a port in an upper manifold or lower manifold corresponding to a damaged filter grid in a pool filter system is provided. The plug apparatus includes a main body having a central body, an upper tubular member designed to insert into one of a plurality of ports in the upper manifold and a lower tubular member designed to insert into one of a plurality of ports in the lower manifold, and an elastic band coupled to the main body and designed to wrap around the upper manifold or lower manifold of the pool filter system to ensure the upper tubular member or lower tubular member of the main body is secured to the one of the plurality of ports in the upper or lower manifold.