Whale Compac 50 Low-Profile Underdeck Diaphragm Pump

Whale Compac 50 Low-Profile Underdeck Diaphragm Pump

A compact, low-profile diaphragm pump designed for underdeck installation where space is tight. At just 4-3/4″ deep, the Compac 50 fits into shallow bilge and locker spaces that standard pumps cant reach, while still delivering reliable transfer performance for water and diesel applications.

Key Features

• Low-profile design only 4-3/4″ deep, ideal for shallow underdeck spaces
• Completely enclosed, protected diaphragm for reliable, maintenance-friendly operation
• Easily removable clamp ring for quick access and servicing without tools
• Rotating inlet and outlet nozzles for flexible hose routing during installation
• Supplied with a deck plate for topside pump operation
• Suitable for pumping diesel as well as water
• Takes 1″ hose connections

Parts Desk Insights

Best use case: The Compac 50 is the right pump when you need underdeck installation in a space too shallow for a standard diaphragm pump common in smaller sailboats, RIBs, and centre consoles with limited bilge depth. The rotating nozzles make it especially practical in tight quarters where hose routing is awkward. The diesel compatibility also makes it a solid choice for fuel transfer applications. If you need a deck plate key for the included deck plate, see the Deck Plate Key or the Universal Deck Plate Key.