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Mira 903.33 thermostatic cartridge assembly, Excel/Select Mk1

Mira

Mira 903.33 thermostatic cartridge assembly, Excel/Select Mk1

A Mira thermostatic cartridge assembly for pre-2003 Excel and Select Mk1 mixer showers, suitable for high or low pressure installations.

At a glance

  • Also known as 2314948, MIRA-903.33
Manufacturer part no.
903.33
Showing prices

£316.52

£263.77 ex. VAT · VAT at 20%

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

Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

The 903.33 (Mira reference 1.903.33.6.0) is a thermostatic cartridge assembly for the Mira Excel/Select Mk1 mixer shower range (1990-2003) and the Excel B/Select B range (1996-2003). It is the internal cartridge that blends hot and cold water to a stable outlet temperature.

Signs this part needs replacing

  • Water temperature drifts or fails to hold steady during use
  • Shower runs noticeably cooler or hotter than the set temperature
  • Reduced flow from the shower head with no blockage elsewhere
  • Difficulty adjusting or turning the temperature control

Before you order

  • Confirm your shower is the pre-2003 Excel/Select Mk1, not a post-2003 model
  • Isolate the water supply before removal
  • Match the exact cartridge reference printed on the existing part

Not sure which part?

Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.