Armitage Shanks A861123NU Sequential Thermostatic Cartridge for Markwik 21+ TMV3 Valves

Summary

Armitage Shanks A861123NU Sequential Thermostatic Cartridge for Markwik 21+ TMV3 Valves

Q&A: A861123NU Armitage Shanks Markwik 21+ Thermostatic Cartridge

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Q: What specific taps is the A861123NU sequential thermostatic cartridge used in?

A: Armitage Shanks A861123NU is the genuine spare part for:

• (A66696AA) Markwik 21+ Thermostatic Basin Mixer Demountable
• (A6734AA) Markwik 21+ Deck Mounted Thermostatic Tap Bioguard
• (A6791NU) Markwik 21+ Thermostatic Basin Mixer

Q: We have an A6791NU tap. How to replace the Armitage Shanks A861123NU?

A: This is how to open the Markwik 21+ Thermostatic Basin Mixer to change the A861123NU.

1. Isolate the Water Supplies

• Remove the grey button near the base of the tap. There are two: one for hot (left side) and cold (right side).
• Use a 5mm Allen key and screw in a clockwise direction to close water supplies.
• Open the tap and test if isolation is successful.

2. Remove the Tap Handle

• Unscrew, anti-clockwise, the top cover (the plate blue and red indicators sit) of the handle.
• Use a 4mm Allen key to undo the handle retaining screw.
• Lift to remove the lever handle.

3. Armitage Shanks A861123NU Cartridge Removal

• Remember the orientation of the lower temperature stop ring (see where the “maximum blend indicator is pointing). It has to be returned to the same position in reassembly. Taking a photo before lifting the stop ring out might help.
• Remove the temperature stop ring.
• Use a 36mm a/f deep socket to unscrew the A861123NU sequential thermostatic cartridge. While unscrewing the cartridge, hold on to the tap spout to prevent it from rotating.

4. A861123NU Armitage Shanks Cartridge Installation

• Insert the replacement A861123NU in the A6791NU Markwik 21+ tap.
• Screw it in place and use the deep socket to tighten. Do not overtighten.
• Return the stop ring in the same position as before disassembly.

5. Reassemble the tap handle.

6. Re-open water supplies.

The A861123NU and other Armitage Shanks Spares are dispatched on the same working day (M-F) for orders made before 3 PM.