Is this causing sand to go into the pool?

[Bosch232]

I pulled the top off my old Media Master 19" this morning because in the past 2 days it's belched an unusually large amount of sand into the pool. Will a crack like this cause it to do that?


http://img.photobucket.com/albums/v232/Bosch232/MediaMasterValve_zps1d68c3a7.jpg (http://smg.photobucket.com/user/Bosch232/media/MediaMasterValve_zps1d68c3a7.jpg.html)