Mira Excel thermostatic cartridge assembly (451.71)

Mira Excel thermostatic cartridge assembly (451.71) - main image 1 Mira Excel thermostatic cartridge assembly (451.71) - main image 2


£142.05 (£118.38 ex. VAT) + P&P Lowest Price Guarantee
In Stock RRP £202.15
  • Product Description:

    Mira 451.71 Excel thermostatic cartridge assembly.

    This product is for shower models made after 2003.

    For Mira Excel/Select models prior to 2003, please see the Mira 903.33 thermostatic cartridge assembly instead.

    Product code also known as Mira 1.451.71.3.

    The Mira Excel thermostatic cartridge assembly (451.71) is a genuine, brand new Mira product, covered by a minimum 1 year Mira manufacturer's guarantee.

    Available for same day despatch if ordered before 3:30pm Monday-Friday (otherwise despatching will be on the next working day). For the delivery options available for this product, please add it to your Basket or see our delivery options page.

    Not what you're looking for? See all Mira shower cartridges or try our unique Shower Spares Finder.

    For advice on this or any product, please call 01452 619836, email us at support@showerspares.com, or see our contact page.

    Product Specifications:

  • The Mira Excel thermostatic cartridge assembly (451.71) will fit the following 5 products.

    List(s) are sorted by product type and then alphabetically.

    Hover overTap any icon below to see a preview of that model.

    May fit other products.

    If you are unsure of your product model, or would like more information, please contact us.

  • A selection of the latest reviews for the Mira Excel thermostatic cartridge assembly (451.71) can be read below:

    • First class service and Delivery

      Paul Butcher

    • Worked perfectly, and excellent service.


    • Arrived quickly, great price. Will definitely use again.

      Jo Jones

    • cannot fault the service 5 star

      Alan Cox

    • Peter Dawson very good service and helpfull staff

      Peter Dawson

    • Complete kit received and fitted. No problem.

      Richard Bayley


      Michael Darragh

    • An excellent and easy replacement of the shower cartridge for the normal DIYer. Good instructions on how to install. Not quite clear on how to make adjustments but I worked it out.

      Paul Barrow

    • Excellent service and a great price. would recommend.

      Alan Kidd

    • Easy DIY fit.

      Martin Meechan

    • Perfect replacement, easy for any DIYer to fit.
      I didn't realise until I was trying to fit the control knob that I had to change the white stub that was fitted for the longer one.
      The short stub must be for the surface mounted mixer - mine is a concealed type.

      Keith Foster

    • Fast delivery; easy to fit; stopped the leak!

      Peter Lovatt

    • After watching the NSS video on fitting the cartridge, it went in with no problems.

      John Trinder

    • Super fix to unit, quick and easy to install, competitively priced for original parts. Prompt next day delivery.

      Dave Price

    • Good service by NSS for an otherwise very expensive shower part ..... the Mira excel cartridge feels expensive enough that it should have 5 or 10 year warranty ........ I prefer bar shower thermostats where the cartridges are a fraction of the price to replace .... Also need to look up online how to adjust the temperature range ....... as changing the white central part (has a long and short option) lost the postioning ........ great service by NSS ....... would consider other more cheaply serviced shower taps if fitting from new


    • Excellent product, arrived earlier than the forecast date and was fitted within half an hour of receipt. The most pleasing aspect is the price. It is a genuine mira part, but approximately £50 cheaper than the Mira website!! Fantastic service will definitely recommend and use again.

      David Cornford

  • Do you have a question about the Mira Excel thermostatic cartridge assembly (451.71)?

    Click the button below to send a question to one of our expert members of staff and we will email you back a direct response. If we feel the information might be useful to other customers, we will also show your question below for others to see.

    Ask a Question

    • Hi, I have this cartridge and the hot and cold settings are all to cock when I tried to clean it. Does the new one come ready set for use? Do I just pop it in and away you go? Thanks

      Hello, it is ready to fit, you may have to tweak the max temp setting, full instructions in with the new part.

    • I have a Mira excel shower post 2002 and the hot water supply stopped so I pulled the cartridge out and found that the hot water inlet wasn't opening as the plastic that slides the Bakelite plate has snapped. just wondering if that part can be sold separately?

      Hello, very sorry, but Mira do not do spares for the cartridge, just a complete cartridge.

    • how do I stop my Excel from dripping

      Hi, you will need to replace the Mira Excel cartridge 451.71, there is no way to recalibrate the cartridge.