Stuart Turner Monsoon Universal 4.5 Bar Twin Shower Pump


MFC CODE: 46412


RRP: £936.67


3 Working Days Approx

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Stuart Turner, a name that is synonymous with superior quality pumps, is always seeking to introduce innovative products to meet the demands of the discerning homeowners. In keeping with this tradition, it has now introduced the Universal Twin Showering Pump, from its Monsoon range, which is designed to boost both hot and cold water supplies equally. Capable of increasing water pressure for a host of domestic & light commercial applications from a single tap or shower to a complete bathroom or the whole property, it is suitable for installation into an open vented hot and cold water system. Constructed from high quality brass, for enhanced durability, it has a system friendly peripheral design that reduces potential to airlock.

+  Read what's included..
Please Note all the measurements are in 'mm'
Shape Round
Country of Origin UK
Warranty/Guarantee 5 Years
Material Brass
Width 310
Depth 162
Height 243
Compliance/Approvals/Standard WRAS,ISO 9001:2008,BS EN 60335,CE
Product Type Booster Pump
Bar Rating 4.5
Impeller Twin
Head Positive,Negative
Motor Rating Continuous
Fuse rating 13 Amps
Power Supply 230 Volts AC
Power Consumption 1135 Watts
Mechanical seal Nitrile/Carbon/Silicon Carbide Seal
Anti Vibration Feet Yes
Flexible Hoses 4
Dry Run Protection Yes


  • Pressure: 4.5 bar
  • Designed to boost both hot and cold water supplies equally
  • Works under both positive and negative head conditions
  • Manufacturing code of this product is 46412
  • Constructed from high quality brass
  • Suitable for installation into an open vented hot and cold water system
  • Capable of boosting water pressure for a host of domestic & light commercial applications from a single tap or shower, to a complete bathroom or the whole property
  • Size of this product: Length 310mm x Width 162mm x Height 243mm
  • System friendly peripheral design - reduces potential to airlock
  • Extended life mechanical seal - Hard faced nitrile/carbon/silicon carbide seal
  • Fully automatic and Continuously rated
  • G 3/4" male connections
  • High capacity inlet strainer - prevents debris from entering the pump, for an extended life
  • Features dry run protection and run on timer
  • Supplied with 4 x 300mm anti-vibration flexible hoses with integral isolating valves
  • Flexible hose connections: G 3/4 female x 22mm push-in x 300mm long
  • Features anti-vibration feet and pre-wired for easy installation
  • Pre-wired with 1.5 metre power cable - no need to access terminal box
  • Built-in safety extra low voltage [SELV] -  9v for all switching control systems
  • Incorporates both pressure and flow switch - Flow switch [automatically starts when the flow exceeds 0.6 litres/min] and Pressure switch [automatically stops the and re-pressurises the system]
  • Approvals and Compliant: WRAS approved, ISO 9001:2008, BS EN 60335 compliant and CE compliant
  • Can be used to:
  • Boost hot and cold water services to the complete home, bathroom, kitchen or cloakroom
  • Pressurise the supply in applications such as loft conversions, where outlets are higher than the water source
  • Pressurise the complete system where it is uncertain whether a positive flow naturally exits
  • Technical Specifications:
  • Run on timer - 3 sec
  • Maximum Flow - 51 l/min
  • Maximum static inlet and outlet pressure - 12 metres
  • Flow switch sensitivity [approximately] - 0.6 l/min
  • Pressure vessel air pre-charge - 1.3 bar [18.5 psi]
  • Power supply / phase / frequency - 230 V a.c. / 1 / 50 Hz
  • Current [full load] - 5.1 Amps
  • Power consumption - 1135 Watts
  • Fuse rating - 13 Amps
  • 5 years of guarantee from Stuart Turner
  • For installation instruction and technical details, download PDF from technical tab.

Please Note: Universal pump do not require a gravity flow of water to start.

Sizes Available
Other Sizes / Finishes / Variations Available.


Total: £660.43 3 Working Days Approx QS Supplies

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Questions & Answers

Submit Your Questions 1 Questions Asked

Have a question about this item? Ask our tech team. We aim to reply within 72 hours. If you want to know get answers fast, please call us on 0116 251 0051

Jim Asked :
Hit, 2 questions. Do these pumps (Stuart Turner Monsoon Universal 4.5 Bar Twin Shower Pump) require to have hot fed from Surrey flange, or will Tee from vertical HW downflow suffice? What is operating noise from this regenerative pump in use? Thanks

Answered By QS Team :

Below is a link to the installation manual that you will get with the pump. (Installation Link)

The U4.5BT has to be fed via flange or a secondary tapping from the cylinder. If you use a side entry flange or a secondary tapping you will need to have an anti-gravity loop as well.

If the flange is out of the top of the cylinder, you do not have the loop. You will need a manual air vent to release the air at the top of the inlet pipework before it then drops and enters the pump.

The feed to the hot water cylinder from cold water tank will need to be a minimum of 28mm with this size of the pump. The minimum noise from the Monsoon range of pumps is 50 dbA and the maximum is 70dbA. The actual noise of the pump will depend on how it’s installed and also what pressure you are using the pump at. The pressure will be dependent on how much water you are using. The lower the flow, the higher the pressure, the noisier the pump will be.

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