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Plumbing and Gas News

Practical tips for maintenance, service and repairs of plumbing and gas appliances

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Maintenance and Service


Ideal Standard S960025NU Cartridge Removal

Ideal Standard’s S960025NU is fitted in many taps such as:

– Ideal Standard Senses Sphere Basin Pillar Tap

– Alchemy Dual Control Wall Basin Mixer - Lever Handles Basin Taps

– Sandringham Sink Mixer Rim Mounted 2Th Ah Kitchen Taps

– Affinity Kit Mixer Rim Mounted Mono Xh Kitchen Taps


The tap photo shown in this guide is the Ideal Standard Senses Sphere.


The S960025NU is a pack of two cartridges namely the:




This is the removal process for the Ideal Standard Senses Sphere Tap:

1. Remove the handle lever by turning it anticlockwise.

2. Use a 2.5mm Allen key to loosen the handle’s grub screw.

3. Lift to remove the handle.


4. Undo the cartridge screw to remove the insert.

5. Unscrew the cartridge anticlockwise and lift to remove it.



Vado CEL-RETROFIT/B Replacement Process

The Vado CEL-RETROFIT/B fits most B-type shower valves. However, it is not for the Vado Notion, C-types, and bar valves. This is a TMV2 cartridge and is suitable for low-pressure systems.


How to Replace the Vado CEL-RETROFIT/B

1.    Use a 2.5mm Allen key to remove the control handles.

2.    Remove the temperature stop ring.

3.    Turn the retaining rings anti-clockwise to remove.

4.    Remove the faceplate.

5.    Isolate the hot and cold water supply. Isolation screws can be found on both sides of the valve.

6.    Use an Allen key to remove the old Vado cartridge.

7.    Put silicone grease on the O-rings of the replacement Vado CEL-RETROFIT/B thermostatic cartridge and secure it in the shower valve.

8.    Reassemble the faceplate and handles.



Ideal Standard/Armitage Shanks Simple Tips: Installing A962478NU Solenoid Valve

Ideal Standard/Armitage Shanks A962478NU is a solenoid valve for Armitage Shanks Sensorflow 21 and Markwik electronic taps. It is not suitable for the Sensorflow Solo or the Sensorflow 2.


Solenoid valves control the water flow in hands-free taps using an electric current. Before attempting to change the solenoid valve, it is recommended to turn off water supplies and remove the electronic board from the plug for safety.


Push the Ideal Standard/Armitage Shanks A962478NU in the chamber and properly position it. Screw it securely in place.



Worcester Greenstar 30CDI Combi - intermittent hot water

Worcester Greenstar 30CDI Combi - intermittent hot water

Hot water fluctuates between hot and cold or hot water is unstable.
Remove the cover of the boiler and run hot water tap. Touch the plate heat exchanger at the back of the boiler. If the heat exchanger is very hot but hot water pipe is just warm then the heat exchanger is blocked and needs replacement.
You will need to drain both the heating system and the hot water to replace the heat exchanger. Some of the pipes and Water unit on the left will need to be removed in order to get the heat exchanger out.

The part number for heat exchanger is 87161066850



Armitage Shanks Fixing Temperature Problems with Armitage Shanks A

A962280NU is the replacement cartridge for the Markwik Contour 21. It is a TMV3 cartridge made from brass and plastic polymer. 


Thermostatic cartridges are made to combine hot and cold water for a relaxing shower session. But, if a Markwik Contour 21 Mixer is suddenly producing only hot water (or only cold water), it might be a sign the thermostatic cartridge has worn out. Check if the cold (or hot) water supply line is clear from any debris that obstructs water flow. If it is clear, the thermostatic cartridge might be what is causing the problem.


Armitage Shanks A962280NU Cartridge Removal for the Contour 21 A4135AA

Please shut off hot and cold water supplies before starting.


1. Remove the decorative insert found on the top of the handle to access the grub screw.

2. Use a 4mm hexagonal key to unscrew the grub screw.

3. Lift the handle and the ring piece out.

4. Use a 36mm box spanner to unscrew the old cartridge out of the valve.

5. Apply silicone grease on the O-rings of the A962280NU.

6. Fit and secure the cartridge in the valve and reassemble the handle.


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