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Maintenance and Service

Exam revision materials for Plumbing Level 2&3 and ACS Gas Safety test

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Showers

S960134NU Thermostatic Cartridge

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S960134NU Thermostatic Cartridge

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S960134NU Thermostatic Cartridge Issues and Solutions

The Ideal Standard / Trevi S960134NU thermostatic cartridge is used in a number of different shower valves which were made post 1997.  The brass construction of the cartridge is prone to limescale buildup, therefore the cartridge can and will deteriorate over time.  If you live in a hard water area the cartridge will fail sooner than if you lived in a soft water area.

As always, to extend the life-cycle of a thermostatic cartridge we at Di Vapor® recommend customers install a water softener of some sorts to reduce the calcium lime that enters the valve.  If you need to replace the cartridge you can buy one here

So what are the issues you'd expect to find in a shower valve that has one of these faulty S960134NU cartridges?  Below are a list of the issues:

  1.  Your shower will not regulate temperature correctly.  This can come in a number of different ways.  You mayexperience spiking or fluctuating water temperatures where one second the water is luke warm, the next scolding hot, the next cold.  This is most definitely a tell tale sign of a cartridge which is on its last legs.  The cartridge can also become seized up on the inside which will mean that it not even change the temperature of the water.  In this scenario you'll only get one temperature out of the valve, at which ever point the cartridge has seized up.
  2. Leaking: The cartridge may need replacing if water is leaking from around where the thermostatic cartridge is installed into the shower mixer valve.  This is due to a deterioration of the cartridge.
  3. Water temperature not changing fast enough.  When you turn the temperature knob on your shower the water should change temperature within a couple of seconds (if it is receiving a steady flow of hot and cold water).  If the temperature of the water takes longer than this then the thermostatic element in the shower cartridge is struggling to adjust the cartridge.

In all of the above scenarios, should your shower be receiving a balanced feed of hot and cold water then the solution is to replace the thermostatic cartridge.  If you need a S960134NU, you can buy one here.

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