Office Open Mon-Fri 9am-5pm
Luxury Bathrooms & Spares Experts
Bathroom Spares Experts
Contact Cart
Thermostatic Cartridge Replacement Thermostatic Cartridge ReplacementMX ZKN Thermostatic CartridgeThermostatic Cartridge

MX ZKN Thermostatic Cartridge Replacement

Part Number: MX-ZKN

SALE: £95.99

You save: £24.01 (20%)
Price includes VAT
Wrong Item? Click to see More
UK Lowest Price Guaranteed
Next Day Delivery Available
Product description


MX ZKN Thermostatic Cartridge Replacement

Know Your Shower Spares: MX ZKN Thermostatic Cartridge

MX ZKN is the thermostatic cartridge needed for Atmos Select 3 Way concentric shower valves. Read ahead for cartridge information and fitting instructions.

Shower valves are typically equipped with one to three cartridges. These are the flow cartridge, the diverter cartridge and the thermostatic cartridge which is what the MX ZKN is.

A thermostatic cartridge works by taking incoming hot and cold water through its gauze filters. The filters strain limescale and dirt as water passes. This MX shower spare has two filters.

Inside the cartridge lays the wax thermo-element. The bottom part of it can be seen protruding out of the MK ZKN barrel (Please refer to the third photo in the gallery). The thermo-element mixes hot and cold water together. Its aim is to produce the exact water temperature desired by the shower user.

Factors that can harm the cartridge and its parts include poor water quality, high water pressure and wear and tear.

Fitting the MX ZKN Thermostatic Cartridge in the 3/4” BSP Atmos Select Shower Valve
Make sure the parts you remove are returned in the same position during reassembly.

– Switch off the shower’s hot and cold water supply lines and pressure. This is a precaution that will prevent accidental water flow or the cartridge shooting out of the valve by itself.

– There is a retaining screw under each of the shower valve’s handles. Use an Allen key to loosen or remove the screw. Separate the handle from the shower valve.

– Remove the parts under the handle: the cover plate, the chrome cover seals, temperature stop, the thermostatic cartridge retaining ring and the cartridge.

– Apply a thin layer of plumbing grease on the replacement MX ZKN thermostatic cartridge. Slip the new spare part in the shower valve. Secure it in place by putting back the retaining ring.

Please scroll down to the bottom of the page for the silicone-based shower repair grease we offer.

– Reconstruct the valve by returning the cover seals, the stop ring, the cover plate and handle.

Di Vapor is one of the most dependable shower spares providers in the UK. We have other MX spares in stock and ready to ship.

Contact us should you need help in finding the shower repair supplies you need. Our friendly and reliable spares experts will always be glad to assist you.
shipping & Returns


  • Delivery of this item is priced as a 'small' packet. UK delivery costs £3.75.
  • For all in-stock spare parts the typical UK delivery timescale is 2-5 working days.
  • If you need a part urgently then we can provide a next-day (delivered Mon-Fri) UK delivery service for all in-stock small parcels ordered before 3.30pm, Monday - Friday.
  • Next day delivery is available to select at an additional charge during the checkout.
  • We delivery WORLDWIDE. For more information about international deliveries, read our delivery page.


  • If you need to return a part then please telephone Di Vapor on 0121 705 0866 with the reasons for the return within 14 days of receiving the goods.
  • For more information please see our terms and conditions.
Payment & Security

Payment Methods

Di Vapor accepts the following payments methods:

  • Visa
  • Mastercard
  • Paypal
  • Maestro
  • American Express (via PayPal guest checkout only)
  • Cheque (must be cleared before dispatch)
  • BACS


Di Vapor treats your privacy and security with the utmost importance. The payment systems used by Di Vapor are based on industry standards to ensure all payments are securely handled. In fact, we ensure the Di Vapor website is regularly checked to guarantee compliance to PCI security standards.

Related items you may need