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Stuart Turner Monsoon S4.5 Bar Single 46420

Stuart Turner

Stuart Turner Monsoon S4.5 Bar Single 46420

Stuart Turner Monsoon S4.5 Bar Single pump for boosting water pressure in domestic hot and cold supplies.

Manufacturer part no.
46420
Showing prices

£357.12

£297.60 ex. VAT · VAT at 20%

Available to order · 1-2 working days
Available to order · 1-2 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.

Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

The Monsoon S4.5 Bar Single is a pressure booster pump manufactured by Stuart Turner and part of the Monsoon range. It is a single pump unit rated at 4.5 bar, used to raise water pressure on domestic hot and cold supply systems where gravity or mains pressure is insufficient. The pump is installed on the pipework serving the outlets that require a boosted supply.

Signs this part needs replacing

  • The pump runs but delivers little or no increase in outlet pressure.
  • Motor fails to start when a tap or outlet is opened.
  • Excessive noise, rattling or vibration from the pump body during operation.
  • Water weeping from the pump casing, connections or seals.
  • Repeated tripping of the electrical supply or intermittent running.

Before you order

  • Confirm the existing pump is a Monsoon S4.5 Bar Single and that the 4.5 bar rating suits the installation.
  • Check whether the system is served by a single pump or a twin pump arrangement.
  • Verify available space and pipework connections at the intended installation point.
  • Check the electrical supply and any controls associated with the existing pump.

Not sure which part?

Tell the parts assistant what it's going into — the appliance make and model, or the GC number off the data badge — and it will check this part is on the fit list.