I replaced my original ball scuppers with a set of T-H marine Flow Max Ball Scuppers. My boat gets parked under oak and maple trees and the scuppers would get clogged with tree stuff. It was a real pain keeping them clean. My new scuppers twist off with a 1\4 turn and are a cinch to keep clean and clear. Plus they work just fine as ball scuppers. I think they were like 15 bucks and worth every penny.