Description
Whale Gulper Grouper Mk 3 Fishbox Discharge Pump BP4772 (12 Volt) BP4774 (24 Volt)
Built on more than a decade of market leading pump technology. Unlike macerator pumps, Gulper valve technology means no filters, no clogging or motor burn out, just reliable waste management.
Pumps out fishbox and baitwell waste without clogging.
Features and Benefits
- You can depend on diaphragm pump technology: no impeller to clog or burn
- Non-choke valves – easily handle fishbox waste
- Easy to install – 360 degree head rotation and choice of 1 inch (25 mm) or 1 ½ inch (38 mm) hose connections
- Easy to maintain and clean
- Ideal replacement for macerator pumps
- Fast pump out – up to 18 litres (4.74 US gallons) per minute
- Long term durability – runs dry without damage
- Save battery – low power consumption
| General Specifications | 132018
BP4772 (12 Volt) |
132019 BP4774 (24 Volt) |
|---|---|---|
| Description | Gulper® Grouper Mk 3 Fishbox Discharge Pump with 90° head | Gulper® Grouper Mk 3 Fishbox Discharge Pump with 90° head |
| Voltage | 12 Volt | 24 Volt |
| Recommended Fuse Size Automotive | 10 amp | 5 amp |
| Minimum Wire Size | 1.5 mm² (16 AWG) | 1.5 mm² (16 AWG) |
| Weight | 1.6 kg (3.5 lbs) | 1.6 kg (3.5 lbs) |
| Hose Connections | 25 mm (1 inch) or 38 mm (1 ½ inch) | 25 mm (1 inch) or 38 mm (1 ½ inch) |
| Materials | Pump Body: Aluminium, Glass-filled Nylon Clamp Ring: Acetal Diaphragm: Santoprene® Valves: Nitrile® Feet: EPDM Gearwheel: Delrin Fasteners: Stainless Steel, Brass |
Pump Body: Aluminium, Glass-filled Nylon Clamp Ring: Acetal Diaphragm: Santoprene® Valves: Nitrile® Feet: EPDM Gearwheel: Delrin Fasteners: Stainless Steel, Brass |
| Materials in Contact with Fluid | Glass-filled Nylon, Santoprene®, Stainless Steel | Glass-filled Nylon, Santoprene®, Stainless Steel |
| Maximum Suction Lift | 1 metre (3.3 feet) | 1 metre (3.3 feet) |
| Maximum Discharge Head | 2 metres (6.5 feet) | 2 metres (6.5 feet) |
| Maximum Discharge Head and Suction Lift (combined) | 3 metres (10 feet) | 3 metres (10 feet) |
| Flow Rate per Minute | 18 litres (4.74 US gallons) | 18 litres (4.74 US gallons) |
| Dry Running Current | 4 amps | 2 amps |
| Performance Data Suction Lift | 0 | 0 |
| Discharge Head | 1 metre (3 feet) | 1 metre (3 feet) |
| Flow Rate per Minute | 16 litres (4.22 US gallons) | 16 litres (4.22 US gallons) |
| Current Draw | 6 amps (12 Volt DC) | 3 amps (24 Volt DC) |
Warning: Always ensure the correct fuse size is used to protect the pump and wiring. Incorrect fuse sizes may cause electrical hazards or damage to the pump.
Boat Hut Insight
While the Whale Gulper Grouper Mk 3 pump’s ability to run dry without damage is a major advantage, it’s worth remembering that no pump should be left running unattended for long periods without water. Even with dry running capability, running the pump dry continuously can reduce the lifespan of the diaphragm and valves over time.
Also, when selecting hose size, consider your boat’s plumbing layout and flow requirements. Although the pump supports both 25 mm (1 inch) and 38 mm (1 ½ inch) hoses, using the larger diameter hose where possible will reduce friction losses and improve pump efficiency, especially for longer runs.
Lastly, if you’re upgrading from a macerator pump, this diaphragm pump’s low power draw means you might see a noticeable improvement in battery life — a small win for your onboard electrical system and your peace of mind.
