Whale BP0535 Henderson MK5 Waste Pump – Through Deck Mount (Manual 38mm Hose, 42–66 LPM)

SKU: BP0535

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.

Sale price£99.00

Out of stock items can be ordered and shipped out within 3-5 working days

Pickup currently unavailable at Marine Chandlery: North Shields

Whale BP0535 Henderson MK5 Waste Pump – Through Deck Mount (Manual 38mm Hose, 42–66 LPM)

Whale BP0535 Henderson MK5 Waste Pump – Through Deck Mount (Manual 38mm Hose, 42–66 LPM)

Marine Chandlery: North Shields

Pickup currently unavailable

Unit G4 Narvik Way
Tyne Tunnel Trading Estate
North Shields NE29 7XJ
United Kingdom

+441914297309
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


Delivery

Delivery Information

At Marine Chandlery, we aim to get your orders to you as quickly and efficiently as possible. Here’s everything you need to know about our delivery process:

Dispatch Times

  • All goods are usually dispatched within 1 working day of your order being placed.
  • For orders placed over weekends or bank holidays, dispatch will occur on the next working day.

Delivery Costs

  • Delivery prices are calculated at checkout based on the size, weight, and destination of your order.
  • Rest assured, we strive to keep our shipping costs fair and transparent.
  • Unfortunately, our default UK delivery costs exclude Highlands, Ireland and Northern Ireland. Please contact us for a quote.

Important Information on Larger Items

  • Please note that outboards and inflatables are excluded from standard delivery pricing.
  • These items require specialised handling and are shipped via a bulky courier service. The shipping cost for such items will be confirmed during checkout or upon enquiry.

Delivery Partners

We work with reliable couriers to ensure your goods arrive safely and on time. Once your order is dispatched, you’ll receive tracking information to stay updated on its progress.

Price Match Promise

We'll beat any like-for-like quote.

Expert Customer service

We are available from monday to friday to answer your questions.

Secure payment

Your payment information is processed securely.