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A963400NU Ideal Standard Trevi On Off Ceramic Disc Flow Cartridge Clockwise Close for Taps and Showe A963400NU Ideal Standard Trevi On Off Ceramic Disc Flow Cartridge Clockwise Close for Taps and ShoweA963400NUIdeal Standard A963400NU

Trevi A963400NU Half Turn On/Off 1/2" Flow Cartridge (Anti-Clockwise Turn to Open)

Part Number: A963400NU
Price: £26.98
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Product description


A963400NU Ideal Standard / Trevi G1/2 X 180 On/Off (Clockwise Close) Ceramic Disc Flow Cartridge for Taps and Shower Valves. Please note that the cartridge with code B960350NU is not a suitable replacement as it has a different number of splines. Please note, you will receive the new brass version of the cartridge as per the first photo, however the screw is no longer included. If you need the screw you can buy it here: Trevi E918322NU Screw

The A963400NU is used in the following shower and tap valves:
- A4290AA Melange faceplate and handles for use with A3969NU Trevi TT shower valve
- A4336AA Melange exposed thermostatic shower valve - no shower kit
- A4337AA Melange exposed thermostatic bath shower mixer - no shower kit
- A4740AA Alto Ecotherm bar shower valve with fast fix wall bracket
- A4741AA Alto Ecotherm bar shower valve with fast fix wall bracket and Ideal rain S3 function shower kit
- A4899AA Alto Ecotherm wall mounted bar bath shower mixer with fast fix wall bracket - no shower kit
- A5508AA Alto Ecotherm two taphole thermostatic bath shower mixer - no shower kit
- A5634AA Alto Ecotherm Bath Shower Mixer Wall Mounted
- A5635AA Alto Ecotherm Bath And Shower Mixer D-Mounted Chrome Legs
- A5636AA Alto Ecotherm Bath And Shower Mixer D-Mounted Legs Kit
- A5692AA Alto Ecotherm Exposed Shower & Wall Fix & 1F Kit

Frequently Asked Questions: A963400NU

Question: How do I open the valve to change the A963400NU cartridge?
Answer: Fitting the A963400NU Ideal Standard / Trevi flow cartridge will depend on the type of valve you have.

For the Ideal Standard Melange (A4337AA) and Alto Ecotherm (A5692AA) Exposed Shower Valves:
– Remove the screw cover cap from the handle on the flow side of the shower valve. This is located at the head of the handle. Undo the screw.
– Pull out the handle. Make sure the volume control carrier is also removed together with the handle.
– Grip the spanner on the hexagonal nut of the faulty cartridge. Turn it anti-clockwise to undo the thread and remove the cartridge.

– Coat a thin layer of silicone grease on the rubber seals of the replacement A963400NU Ideal Standard / Trevi shower flow cartridge. The grease will help it squeeze in the valve and protect the rubber seals from premature deterioration. Please move to the last section of this page for the available silicone grease.

– Insert the replacement Ideal Standard A963400NU cartridge in the shower valve and reassemble the parts removed.

For the Ideal Standard Melange (A4290AA) Built-In Shower Valves:
– Remove the screw covers on both the flow handle and the temperature control handle.
– Unscrew the retaining screws and remove the handle.
– Slide out the shower valve’s wallplate.
– Use a spanner to unscrew the old cartridge and discard it.

– Grease the O-rings of the new A963400NU Ideal Standard ceramic disc flow cartridge. Available silicone grease can be seen in the last section below.

– Slide the replacement A963400NU Ideal Standard cartridge in the shower valve.
– Reassemble the wallplate, the handles, the retaining screws and the screw covers.

Question: What are other shower spares for the Melange shower?
Answer: Other Ideal Standard / Trevi shower spares for Melange A4337AA and A4290AA are:
– Seal Kit A962230NU
– Cartridge Screws A962998NU
– Volume Control Handle Carrier A963432NU
– Thermostatic Cartridge A962229NU

Need assistance in finding the spares for tap or shower repair?
+ Please go to our Find a Part page and leave us a message. We will happily answer your queries the quickest we can. (Messages received on a weekend will be responded to first come Monday.)

All spares purchased before 3:00 PM will be shipped out on the same working day.
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.
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