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 service up to 3 working days: €8.95

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€144.95 Incl. 23% VAT

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Aqualisa Shower Thermostatic Cartridge Stainless Steel 125mm is rated 4.7 out of 5 by 11.
Rated 5 out of 5 by from Works a Charm I bought this part for my shower last week. The shower works brilliantly. The part came with screws & seals which was excellent. It just meant that we didn’t have to buy the seals separately.
Date published: 2018-11-13
Rated 5 out of 5 by from Aqualisa Power Shower Cartridge worked perfect as a replacement for the Manual Cartridge
Date published: 2018-08-29
Rated 5 out of 5 by from Aqualisa 609 valve replacey Excellent service from Screwfix. Full parts set included ( screws, seals) . Ignore on line advise and do change " o" rings, they do harden and wear. Make sure you have some silicon grease to hand ( or Vaseline as last resort). Easy job , the best tool for removing recessed back "o" is an engineers scriber that comes with a straight and bent end, bent end is perfect. Good scriber to have in your kit , useful for wood and metal Work.
Date published: 2018-07-03
Rated 5 out of 5 by from Just so easy If you can turn a tap off and use a screwdriver you can install this thermostat. Easy to do, bit awkward changing the end washer (used a paperclip bent to a small hook in the end). Fit new washer, push thermostat in and screw it all together again. Simples. Shower no longer drips - happy days.
Date published: 2018-04-17
Rated 5 out of 5 by from Shower spares Great price saved customer having to replace shower usual quick delivery
Date published: 2018-04-07
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
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