Mira Excel thermostatic cartridge assembly (451.71)

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  • 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:

    • Haven't had a chance to fit the parts yet, but the customer service team were very helpful. Helping me find the parts I needed, all my emails were answered within the hour. Would definitely use you guys again.

      Andrew Parslow

    • Direct OEM replacement part, functions as specified. Good service - efficient ordering and delivery with 36 hours of placement of order.

      P Hanson

    • This cartridge is fantastic quality, well made and so easy to fit using the simple instructions sent with it, fitted the same day, we have had the Mira Excel EV for 17 years and still looks like new, only got the new cartridge due to me braking it while poking about during wet room renovations otherwise it would have still worked. Will definitely buy from again. Thanks Showerspares. 🙏

      Eddie Croft

    • Fitted by a plumber. Replacement for a Mira Excel 2006 model. Excellent delivery, considering it was a bank holiday weekend.

      Helena Gray

    • Perfect

      Michael Razzell

    • I was impressed by the NSS online video tutorial on fitting the cartridge and the company website. Their service was fast and efficient and the cartridge was very competitively priced.

      Robert Merson

    • Easy to install/replace. Fast delivery. 👍

      Roy Parnham

    • The shower stopped working on the Saturday, found out what the problem was, found the part I needed on NSS website, ordered, arrived on the Tuesday, fitted that evening after work, all sorted. NSS provided a fast service and the Website was easy to navigate to find the part I needed.

      William Light

    • Obviously the new thermostatic valve worked a treat and with clear easy to follow instructions only took a moment to fit, but I was most impressed when, having ordered just after lunch, it arrived the next day!

      Steve Clen-Murphy

    • To change the unit seemed to go very well. The plumber completed the job quicker than I expected, so it must have been pretty easy. By changing the cartridge it has improved the shower very noticeably. Very pleased with the service from NSS and the outcome of the cartridge change.

      Alan Gloster

    • Part was exactly as required and despatched same day. Price was a good discount on MRRP, and your YouTube installation video was really helpful.

      Rodney Wood

    • We are very pleased with everything.

      Marilyn Dowdell

    • Part delivered very quickly.
      Fitted after viewing the excellent videos.
      A great service

      Frank Crowcroft

    • Excellent & very professional

      Stephen Jones

    • Excellent service, the very helpful YouTube video gave us the confidence that we could replace this part ourselves. The part arrived promptly and in good condition, and we were able to install it without any difficulty. We now have a thermostatic mixer valve on our shower that works properly!

      Barbara Sumner

    • Great speed and service as always from NSS.

      Tim Hobbs

  • 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.