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


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£174.00 (£145.00 ex. VAT) + Free standard UK P&P* Lowest Price Guarantee
In Stock RRP £252.78
  • 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 6 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:

    • Great service, watched video you do for replacing unit, great help. Job done in short time. Great to do business with, keep up the good work.

      Jenny Kidd

    • Very easy to fit and it was a perfect fit. Fast delivery as well.

      Alan Fink

    • Fantastic customer service and fast delivery.
      Thank you

      Ernesto Esposito

    • Spare is as expected great delivery service all easily arranged


    • Happy with the product, product information and delivery.

      Seph Oconnell

    • Quality spares delivered next day, does what it says on the tin!

      Graham Dyer

    • Excellent service from NSS also great YouTube videos for installation. Perfect delivery despite postal strike. Great product if a little pricey but it works! NSS were cheapest route and if it says in stock, its in stock unlike some others I have used.


    • Quick responsive service, could've got unit a bit cheaper but had free delivery.

      David Wells

    • Easy fitted came with every thing required
      no less than you would expect with a Mira product

      Ian Ramage

    • Product received as per order, and on date expected. Item has been installed and the problem solved. Many thanks.

      Paul Evans

    • Easy to fit precisely correct

      John Dillon Plumbing & Heating

    • Great service with fast delivery. Part returned as no longer needed and refund given immediately.

      Terry Proud

    • Very pleased with product, works very well and straight forward to fit.

      Philip Smith

    • Good service, good value compared to other suppliers.

      Clifford Barber

    • Quick delivery, Very easy to self-fit the cartridge, bought to replace older 'faulty' one, did not initially fix hot/cold shower issue. turned out to be our new boiler's (18mths) DHW setting was far to high (as set by installer), reset DHW setting lowered to 'ECO' normal
      temperature, is much more constant & stable now thanks.
      Thanks to NSS.

      David Hughes

    • Part itself is fine. Received incorrect part initially (picking error).

      Lynne Birkett

  • 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.

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