Roca A525028003 Thermostatic Cartridge Assembly
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Summary
Roca A525028003 RT-10 Thermostatic Cartridge Assembly for Shower and Bath Mixers
Roca A525028003 is an RT-10 thermostatic cartridge assembly for temperature control in selected Roca shower mixers, bath/shower mixers and hydromassage columns. It is the internal cartridge assembly, not a complete shower valve.
The cartridge regulates the mixture of hot and cold water to control the outlet temperature. In the listed Puzzle mixers, it operates separately from the diverter cartridge that selects the shower outlet, so the temperature-control and outlet-selection components should not be confused.
Technical Details
| Part number | A525028003 |
|---|---|
| Cartridge type | RT-10 thermostatic cartridge assembly |
| Function | mixed-water temperature control |
| Spline diameter | 9 mm |
| Height excluding the wax thermostat | 91 mm |
| Diameter at the middle O-ring | 31.6 mm |
The height measurement excludes the wax thermostat and is not the overall length of the complete cartridge. The middle O-ring measurement is a specific measuring point, not a thread size or maximum body diameter.
Confirmed Models Using A525028003
- Roca Puzzle A5A2878C00 concealed thermostatic shower mixer with four-way diverter
- Roca Puzzle A5A2978C00 concealed thermostatic shower mixer with five-way diverter
- Roca A2H0416000 hydromassage thermostatic column
- Roca Moai-T 5A1146C02 exposed thermostatic bath/shower mixer
Before Ordering
Check the exact mixer model and cartridge reference, then compare the removed cartridge with the product photographs, including its spline, body shape, seal positions and fixing arrangement. Do not select this cartridge from the dimensions or range name alone. The listed Moai-T application does not establish fitment across the whole Moai-T range.
Check any required adaptors, retaining components and separate seals before ordering. Do not assume that additional fittings shown in a mixer spares diagram are included with the cartridge assembly.
Fitting Note
Follow the installation and temperature-setting instructions for your exact mixer when fitting the cartridge. Check the outlet temperature and inspect for leaks before returning the shower or bath mixer to use.
Not sure which part you need? Use the Di Vapor part identification service and send us photos of your mixer and cartridge.
Fast delivery
- UK delivery: £5.95 incl. VAT for this small packet item.
- 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 3.00pm, Monday - Friday.
- Next day delivery is available to select at an additional charge during the checkout.
- Worldwide delivery available — see our delivery page for details.
Returns
- 14 days 'risk-free' returns.
- Start a return within 14 days of receiving your order by calling 0121 705 0866 or using our contact page.
- Full returns information is available in our terms and conditions.
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