Proven non-choke valve technology is also available for Fishbox Waste. NEW 90 Degree head directly replaces a macerator.

WHALE BP4772 Attributes

• Type: Discharge
• Voltage Rating: 12 Volt
• Flow Rate: 285 Gallon Per Hour
• Inlet Size: 1-1/2 Inch Hose
• Outlet Size: 1 Inch Hose Barb
• Length: 16-3/16 Inch
• Width: 4-3/4 Inch
• Height: 7-5/8 Inch

WHALE BP4772 Features & Benefits

• Lower Power Consumption: Less Than 1/2 Ampere Draw Of Macerators
• Efficient Operation: Large 1 1/2 Inch Inlet Port
• Low Maintenance: No Impeller To Clog / Burn Out
• Fast Pump Out: Up To 6.75 US Gallons
• Runs Dry Without Damage
• Quieter And Lighter Than Typical Macerators
• Ideal For 25 Feet+ Saltwater Fishing Boats
• Limited 1 Year Warranty

WHALE BP4772 Installation Instructions

• grouper_mk3_182.141_v2_0619_sh_db.pdf

WHALE BP4772 Warranties

• 181.70_v14_1117_db_warranty.pdf

WHALE BP4772 Technical Bulletins

• GrouperMk3Flyer-EU.pdf

Gulper Grouper Mk3 Fishbox/Waste Pump w/90° Ports - 12V

Non clog electric Waste pumps without filters, built on more than a decade of market leading valve technology.

Proven Diaphragm Technology
Whale Gulper waste products have been at the forefront of marketing leading waste technology for over 2 decades. Rather than impeller motors, Gulper pumps contain reciprocating heavy duty diaphragms and specialized non-choke valves to handle grey, bilge, black and fishbox waste on board.

Ideal Macerator Replacement in Fishbox Installations
The Gulper Grouper Mk 3 builds on the decades of proven pump technology and now features 90° inlet and outlet ports with integrated non-choke valves. The improved design allows the pump to be used as a direct replacementfor macerator impeller pumps. Compared to typical macerators, the Gulper Grouper Mk 3 is quieter and lightweight. With diaphragm technology, the pump does not clog or suffer from motor burn out meaning a longer system life and less unwanted maintenance jobs! With a low power consumption and run dry capability the Gulper Grouper Mk 3 really is the pump of choice for fishbox evacuation.


Whal Gulper Grouper Mk3 fish tank/garbage pump is a non-clogging electric garbage pump without a filter. It uses a reciprocating heavy-duty diaphragm and a special non-throttle valve...
SKU: NVN-59896
MPN: BP4772
UPC: 766478949592