Ultra Hudson Reed A3318 Symmetry Thermostatic Shower Cartridge
NOTE: Please contact before ordering as there are several different generations of this cartridge.
This thermostatic cartridge, is a temperature-control component for the Hudson Reed Ultra A3318 Symmetry shower range. It is designed for use within a thermostatic shower mixing valve, where the cartridge regulates the balance of hot and cold water to maintain the selected shower temperature.
A thermostatic cartridge that has become worn, damaged or obstructed may cause fluctuating shower temperatures, water that remains excessively hot or cold, or difficulty adjusting the temperature. Replacing a faulty cartridge can restore normal temperature regulation without replacing the complete shower valve, provided the correct cartridge version is identified.
Technical Details
- - Brand: Hudson Reed / Ultra
- - Part Number: HUD-A3318-CT
- - Product reference: A3318 Symmetry
- - Component type: Thermostatic shower cartridge
- - Function: Regulates the mixing of hot and cold water within a thermostatic shower valve
- - Cartridge versions: Several generations exist, requiring identification before ordering
Important Information Before Ordering
Hudson Reed and Ultra have supplied different generations of this thermostatic cartridge. The cartridge version must therefore be confirmed before ordering. Do not rely on the A3318 reference or visual appearance alone, as the internal construction, dimensions and connection arrangements may differ between versions.
Where possible, remove the existing cartridge after isolating the hot and cold water supplies. Check its overall length, body diameter, spindle dimensions, spline count, seal positions and fixing arrangement. Confirm the exact shower valve model where available. If the cartridge cannot be removed, photographs of the exposed cartridge and temperature-control handle connection may help with identification.
Compatible Models:
NOTE: Contact us before ordering as this shower valve uses different versions of this cartridge.
- - Hudson Reed A3318 Symmetry Black Shower Kit - height 1147mm
Common Thermostatic Cartridge Problems
Symptom: The shower temperature fluctuates unexpectedly. Possible Cause: The thermostatic cartridge may be worn or obstructed, although changes in the hot or cold water supply can produce similar symptoms. Solution: Check the water supplies and inlet filters before considering cartridge replacement.
Symptom: The shower remains too hot or too cold despite adjusting the temperature handle. Possible Cause: The thermostatic mechanism may no longer regulate the water mixture correctly. Solution: Confirm that both water supplies are functioning correctly and identify the correct cartridge version before replacement.
Need Help Identifying Your Cartridge?
Different cartridge generations can make identification difficult. Use the Di Vapor Part Identification Service and send us photographs of your existing cartridge, along with any measurements or shower model details you have. Our team can help you identify the correct spare part before ordering.
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