Paramount BUZZTOP 004203002000 Sump for Channel Drain. Paramount’s BUZZTOP Channel drain is one of a kind. Because of its unique solid top, it is one of the unblockable drains available designed to accept debris. The BUZZTOP can replace non compliant drains in existing swimming pools that need the ability to remove debris. This drain meets the unblockable classification which allows it to easily replace single or dual drains found in older, non compliant pools. It can be installed with its own sump or a field fabricated sump.