Aqualisa Shower Thermostatic Cartridge Stainless Steel 125mm Product Code: 8420G

Stainless steel. Replacement grey thermostatic cartridge. Suitable for use with concealed Aqualisa bi-metallic products, including valves.


  • Suitable for Universal Water Systems
Additional Information
Technical Specification
  • Brand : Aqualisa
  • Product Length : 125 mm
  • Product Type : Shower Thermostatic Cartridge
  • Finish : Stainless Steel
  • Fixings Supplied : Fixings Supplied
  • Pack Size : 1
  • Manufacturer Guarantee : 1 Year Guarantee
  • Pieces in Pack/Case : 1
Product Contents
Delivery & Returns


Standard delivery: €15

Free delivery on all orders over €70.00

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€92.95 Incl. 20% VAT

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Aqualisa Shower Thermostatic Cartridge Stainless Steel 125mm is rated 4.4 out of 5 by 5.
Rated 5 out of 5 by from Shower Thermostat I selected this Aqualisa Shower Thermostat on your site. It was delivered on time which ment I was able to have it fitted and working 3 days after ordering it. No complaints, satisfaction all the way. Orwell..
Date published: 2017-10-31
Rated 5 out of 5 by from Good Value for Money Screwfix is better value than ordering direct from Aqualisa. On reliability, my previous cartridge has lasted nine years, but is now corroding from the hard water. They can be a bit fiddly to fit, in particular the small O ring at the rear, which I've never managed to replace, but the original is fine so I've just left it. There is a U-Tube video which gives the same advice! Do read the instructions about screws as the replacements in the pack are for newer showers. You may need to reuse the old ones if they're brass.
Date published: 2017-10-13
Rated 4 out of 5 by from Aqualisa Shower thermostatic Aqualisa thermostatic shower mixer cartridge Good price, easy fix. Well pleased.
Date published: 2017-09-21
Rated 4 out of 5 by from Good Cartridge I purchased this cartridge to replace one in my shower. Very fiddly to fit (a common issue with these cartridges) as, unless you have an isolated water loop for your shower, the whole system needs to be drained down to fit it, given that it is a pressurised coil. Came with all the parts necessary and installed well. BEWARE : As these are pressurised coils, if you need to drain down your system again for any reason, they will have a 50/50 chance of failing, as happened to me after 3 months ... The coil broke inside the shower unit and I had to purchase another new one.
Date published: 2017-08-20
Rated 4 out of 5 by from Does the job Bought to replace existing cartridge as the shower head started dripping. Easy enough for a DIYer to do but it would be useful if it came with a tool to take out the old o ring as it's very fiddly and we don't own a crochet hook like the instructions suggest. Can't really comment on reliability as its only been in two days.
Date published: 2015-10-03
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