Whale
Whale BP0535 Henderson MK5 Waste Pump – Through Deck Mount (Manual 38mm Hose, 42–66 LPM)
Professional-grade marine product — trusted by boaters across the UK.
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The Whale Henderson MK5 BP0535 Waste Pump is a proven manual diaphragm pump designed for reliable waste and bilge water transfer. Through-deck mounted for easy access, it delivers exceptional pumping performance with minimal effort, capable of moving up to 66 litres per minute...
The Whale Henderson MK5 BP0535 Waste Pump is a proven manual diaphragm pump designed for reliable waste and bilge water transfer. Through-deck mounted for easy access, it delivers exceptional pumping performance with minimal effort, capable of moving up to 66 litres per minute. Built in the UK and trusted by professional boatbuilders, the MK5 combines rugged construction, high output, and simple maintenance for dependable operation in demanding marine environments.
Product Description
The Whale Henderson MK5 Through Deck Waste Pump (BP0535) is a high-performance manual pump engineered for waste and bilge water applications on larger vessels. Its compact through-deck design allows the pumping mechanism to sit below deck while the handle remains conveniently accessible topside, saving valuable onboard space and providing a clean, unobtrusive installation.
Renowned for its robust build and smooth, efficient operation, the MK5 is capable of delivering up to 66 litres per minute (17.5 US GPM) at 70 strokes per minute, or 42 litres per minute (11 US GPM) at 45 strokes per minute. The heavy-duty diaphragm mechanism ensures continuous flow, even when handling thick or semi-solid waste.
Designed for durability and ease of service, the pump features corrosion-resistant marine-grade materials and a removable handle for quick inspection and maintenance. With a maximum suction lift of 4.5 metres (15 feet) and a discharge head of 4.5 metres (14.8 feet), the Henderson MK5 provides powerful and reliable performance when it’s needed most.
Manufactured in the United Kingdom and backed by Whale’s 5-year warranty, this pump remains a trusted choice among cruising sailors, commercial operators, and OEM boatbuilders alike.
Specifications
| Specification | Details |
|---|---|
| Brand | Whale |
| Model | BP0535 Henderson MK5 Waste Pump (Through Deck Mounted) |
| Application | Waste water and bilge transfer |
| Operation | Manual diaphragm pump |
| Mounting Type | Through-deck installation |
| Flow Rate | 42 LPM at 45 strokes/min, 66 LPM at 70 strokes/min |
| Maximum Recommended Head | 4.5 metres (14.8 feet) |
| Maximum Suction Lift | 4.5 metres (15 feet) |
| Pump Head Type | Diaphragm – self-priming, reversible flow |
| Hose Connections | To suit 38mm (1-1/2") ID hose |
| Pump Body Height | 141mm |
| Pump Length | 434mm |
| Series | MK5 |
| Removable Handle | Yes |
| Material / Construction | Marine-grade corrosion-resistant components |
| Country of Origin | United Kingdom |
| Voltage | Manual (no electrical power required) |
| Warranty | 5-year manufacturer’s warranty |
Why buy from Marine Chandlery?
- UK marine specialists, based in North Shields
- Next-day UK delivery available
- Same-day collection from our store
- Expert advice before and after purchase
- Carefully selected marine-grade products
- Secure checkout & trusted payment options
