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From our technical experts

Hydrostar Mk4 Commercial Pump 7.2HP


  • Quieter operation
  • Improved Flow Rates
  • IP55 Protection Ratings



Hydrostar Mk4 Commercial Pump – WHSR703/4 | 7.2hp (5.4kW) 3Ø Hydrostar Mk4 pump


The new Hydrostar MK4 Commercial Pump has been designed to provide a substantially quieter operation and improved flow rates than the MK3 version. A new reshaped design has optimised the hydraulic efficiency of the pump.

• UV stabilised glass-filled polypropylene housing
• Clear polycarbonate strainer lid for quick inspection
• Lid lock ring with ergonomic handles – simple removal & replacement of the lid without the use of additional tools
• 6 litres/ moulded polypropylene strainer basket
• Heavy duty IP55 weather proofed motor with 431 stainless steel shaft
• Enclosed glass filled Noryl impeller for long-lasting reliability
• Available in 4.0, 5.7 and 7.2 HP
• 3 Phase
• 90mm metric half union connections
• Drain plugs


FREE DELIVERY – UK Mainland Only. For delivery charges to all other areas please call or email giving your postcode

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Returns Policy

Your rights to return goods are protected under the EU Distance Selling Directive.

You are entitled to cancel your order and return the goods within 7 working days for a full refund not including the cost of delivery. Do this by contacting us by email or telephone and quoting the order number supplied to you. Your refund will be paid within 30 days. You are responsible for the cost and risk of loss or damage when returning the goods, so you should take out enough postal insurance to cover their value. This cancellation policy does not affect your rights when we are at fault - for example, if goods are faulty or incorrectly-described.

Exclusions: Bespoke items (made to measure items) are not included and cannot be returned. If a bespoke item is faulty then the product warranty /guarantee will take effect.

Any goods returned should be in saleable condition.

These terms apply to your order. We may change our terms and conditions at any time, so please do not assume that the same terms will apply in the future.

None of these terms affect your legal rights and these are not diminished in any way. If any term is held to be invalid under any applicable statute or rule of law, that term is automatically omitted from the terms to minimum extent necessary to comply with the law and without affecting the validity or enforceability of the remainder.