Ideal Standard A963003NU 1/​2" On/​Off Quarter Turn Flow Cartridge - Clockwise Close

Summary

Ideal Standard A963003NU 1/2" On/Off Quarter Turn Flow Cartridge (Clockwise Close).

NOTE: The new brass version of this cartridge will be sent. The screw in the top is no longer supplied with the cartridge.

The A963003NU cartridge is used in the following models:

• B9680AA Natos Basin Pillar Tap
• B9925AA Concept Blue Basin Pillar Taps, 1/2 Inch
• B0727AA Tempo Basin Mixer Rim Mounted Chrome
• B1152AA Calista 2 Hole Bath Shower Mixer With kit
• B9682AA Natos Bath Mixer
• B9884AA Sandringham 21 Bath And Shower Mixer, 2 Tap Hole - Lever Handles
• S7496AA Swan New Bath And Shower Mixer Rim Mounted Chrome 2H Lh
• B9062AA Hyte Sink Mixer R-Mounted Chrome Dc Tub Spt
• B0350AA Alto Bath Pillar Taps Rim Mounted Chrome
• B9883AA Sandringham 21 Bath Mixer, 2 Tap Hole - Lever Handles
• B9059AA Luma Sink Mixer R-Mounted Chrome Dc Tub Spt
• B9679AA Natos Basin Mixer
• B9674AA Alto Dual Control Bath Filler
• S7493AA Swan New Basin Pts Rim Mounted Chrome 1/2inch Lh
• B9887AA Elements Lever Basin Pillar Taps
• B9886AA Sandringham 21 Sink Mixer, 2 Tap Hole - Lever Handles
• B0728AA Tempo Basin Pillar Taps
• B0349AA Alto Basin Pillar Taps
• B9892AA New Elements Lever Dual Control 2 Hole Bath Shower Mixer
• B9064AA Pula Sink Mixer R-Mounted Chrome Dc Tub Spt
• B9683AA Natos Bath and Shower Mixer
• B9675AA Alto Bath Shower Mixer Chrome 2 Tap Hole
• S7495AA Swan New Bath Filler Rim Mounted Chrome 2H Lh
• B8074AA Active pair basin taps
• B9685AA Vectis Basin Pillar Tap
• B9673AA Alto Dual Control Basin Mixer with Pop up Waste
• B1151AA Calista 2 Hole Bath Filler
• B9889AA New Elements Lever Dual Control Basin Mixer ~ With Pop Up Plug Waste
• B9882AA Sandringham 21 Bath Pillar Taps, 3/4 Inch - Lever Handles
• S7494AA Swan New Bath Pts Rim Mounted Chrome 3/4" Lh
• B0294AA Opus Bath Shower Mixer 2H
• B9888AA New Elements Lever Bath Pillar TapsB8421AA
• Rosita dual control one taphole basin mixer with pop-up waste
• B9891AA New Elements Lever Dual Control 2 Hole Bath Filler
• B9677AA Alto Bath Pillar Taps
• N9668AA Reprise dual control three taphole basin mixer with pop-up waste A963003NU Pre 2001 E960583NU Post 2001
• S7489AA Swan New Bath And Shower Mixer Rim Mounted Chrome 2H Xh
• S7469AA Swan New Bath And Shower Mixer Rim Mounted Chrome 2H 5Fh
• B1146AA Calista Basin Pillar Taps
• B9881AA Sandringham 21 Basin Pillar Taps, 1/2 Inch - Lever Handles
• B9890AA New Elements Lever Dual Control Basin Mixer ~ With Plug and Chain Stay
• S7499AA Swan New Kit Mixer R-Mounted Chrome 2H Hrs Lh
• S7497AA Swan New Hn Plrs Rim Mounted Chrome 1/2inch Lh
• B9681AA Natos Bath Pillar Tap
• B1147AA Calista Bath Pillar Taps
• B0731AA Tempo 2H Bath Shower Mixer Rim Mounted
• B9885AA Sandringham 21 High Neck Pillar Taps, 1/2 Inch - Lever Handles

Ideal Standard A963003NU is a 1/2-inch quarter-turn ceramic-disc flow cartridge for selected taps, mixers and separate shower flow controls. Also described as a tap headwork, it screws into the fitting and operates through the existing handle arrangement. The brass version of the cartridge is supplied.

The ceramic-disc mechanism opens and closes the water supply as the handle turns. This is an on/off flow-control component, not a thermostatic temperature-control cartridge or a bath/shower diverter. Persistent dripping from the spout or shower head after the control has been turned off can indicate a worn flow cartridge, although debris or damaged sealing surfaces can also cause leakage.

Technical Details

A 963 003 NU is the manufacturer's spaced format of A963003NU, not a different cartridge. Handle adaptors and fixing arrangements vary between fittings, so retain the original components where they are serviceable and correct for the installation.

Confirmed Models and Versions

The applications below cover the specified versions using A963003NU. Check the existing headwork and the fitting's production version before ordering, as a model name alone does not identify every cartridge revision.

• Ideal Standard Concept Blue B9925AA basin pillar taps - GEN1 version
• Sottini Rosita B8421AA dual-control one-taphole basin mixer with pop-up waste - GEN1 version, hot-side cartridge
• Ideal Standard Luma B9059AA dual-control kitchen sink mixer - GEN1 version, hot-side cartridge
• Ideal Standard Academy A2983AA pillar tap
• Ideal Standard Tempo B0730AA bath filler - version specifying the 1/2-inch A963003NU headwork
• Ideal Standard Connect Air A7031AA pillar tap - production from August 2017 to October 2019 only
• Ideal Standard Natos B9680AA basin pillar taps - version specifying A963003NU
• Ideal Standard Vectis B9685AA basin pillar taps - GEN1 version
• Ideal Standard Ceraflex B1874AA four-hole bath/shower mixer - March 2018 to November 2020 version
• Ideal Standard Ceraflex B1874AA four-hole bath/shower mixer - December 2020 onwards version specifying A963003NU
• Ideal Standard Ceratherm 100 A4656AA separate flow-control assembly - December 2020 onwards cartridge-equipped configuration

Check Before Ordering

Match the original part number, required closing direction, spindle arrangement and handle adaptor. Do not select the cartridge by its 1/2-inch size or the handle colour alone. Its hot or cold position depends on the fitting. Later Connect Air A7031AA taps produced from November 2019 specify a different headwork, so the earlier application must not be extended to those taps.

Related Spares You May Need

These parts are supplied separately and are application-specific. Check the exact tap or valve before ordering an adaptor, handle or diverter; they are not required for every A963003NU installation.

• TACSIL 3g cartridge silicone grease - for seal lubrication where specified by the fitting instructions
• Ideal Standard B960956AA Alto handle with blue index
• Ideal Standard A963196NU cartridge spline adaptor - transfers handle movement to the cartridge in fittings using this adaptor
• Ideal Standard A963004NU companion ceramic-disc flow cartridge - a separate headwork for the corresponding control in fittings that specify both codes, not an alternative code for A963003NU
• Ideal Standard A960516NU four-hole bath/shower diverter valve - a separate outlet-selection component, not a substitute for the flow cartridge
• Ideal Standard A922539NU11 Dekora cartridge-to-handle adaptor
• Ideal Standard A961659NU handle fixation adaptor - used in the corresponding Rosita and Luma handle assemblies
• Ideal Standard B960697AA Sottini Rosita chrome hot handle
• Ideal Standard B960698AA Sottini Rosita chrome cold handle

Fitting Advice

Isolate the water supplies before removing the existing cartridge. Check the cartridge seating area, seals, handle adaptor and fixing screw, and follow the servicing instructions for the exact fitting. After installation, restore the supplies and check that the control operates correctly and shuts off without leakage.

Need help finding the right cartridge? Use our part identification service.