Whale Compac 50 Low-Profile Underdeck Diaphragm Pump
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
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 can’t 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.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.