Mira Excel Spares Cartridge Assembly Black (903.33) Thermostatic Pre-2002 Replacement

I'm no plumber, but this part was a perfect replacement and easy to fit. Even came with instructions on installation. Has worked perfectly since and saved me a fortune having to install a whole new shower.

Bought this as a replacement for the original part. Very easy to fit, works great. Highly recommended.

First 1 leaked. National shower spares sent me a replacement and this one works perfectly. Should of ordered from them directly.

Arrived quickly and fitted in 15 mins.Shower now turns on and off more easily.BUT only three stars to Amazon because the item would cost less if purchased direct from Amazon's supplier as well as several others.

Excellent replacement cartridge saving the expense of replacing the whole shower unit. Instructions are in the box.Make sure the hot and cold water supplies to the shower are cut off before commencing.Once the outer controls have been removed there are only 4 screws to undo to remove the old cartridge.Note how the old cartridge sits before removing (red and blue markers).I found it difficult to switch the control at the back of the new unit from "low" to "high" water pressure using the red key provided but it did move eventually. After that just spread the silicon grease on the inlets and outlets, insert the cartridge the correct way up and secure with the old screws. There are slightly differing instructions depending on the colours used in the old units. The above is for purple cartridges.

Took old part out, put new part in and job done. The only alternative was a new shower. Simple diy job. Would recommend.

Was pleasently surprised to find this unit on Amazon. And is exactly the right unit for my Mira Excel shower that is over 20 years old. This has given it a new lease of life. I was going to ask my local plumber to fit, but it was pretty straight forward to do it myself.

I needed a replacement cartridge for a client of mine , as theirs had not worked since they bought their house 2yrs ago. I found this item on Amazon far cheaper than any merchant or other online shop.After installation the client seems pleased , and as a self employed plumbing and heating engineer that’s good for business.