ZUCCHETTI R97421 Thermostatic Cartridge
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Summary
ZUCCHETTI R97421 Thermostatic Cartridge
The Zucchetti R97421 is a thermostatic cartridge used inside Zucchetti thermostatic shower mixer valves to control and stabilise the mixed water temperature.
This cartridge sits behind the temperature control and blends the incoming hot and cold supplies so the shower can maintain the selected outlet temperature. Replacement may be required where the shower temperature becomes difficult to regulate, fluctuates during use or no longer reaches the required setting after normal servicing checks have been carried out.
Technical Details
| Brand | Zucchetti |
|---|---|
| Part Number | R97421 |
| Part type | thermostatic cartridge |
| Cartridge diameter | 32 mm |
| White plastic section length | 85 mm |
| Handle coupling | round brass coupling pin with 8x20 serrated lines |
| Associated valve reference | R97822 built-in 1/2 inch thermostatic mixer with 3 stop valves |
| Valve installation reference for R97822 | G1/2 connections with MIN 90 mm and MAX 115 mm installation depth |
Confirmed Compatible Models
- Zucchetti ISY ZD4661 / R97822 1/2 inch built-in thermostatic shower mixer with 3 stop valves
Before Ordering
- Check the visible cartridge code and shape against the cartridge removed from the valve before ordering.
- Do not order by diameter alone because cartridge diameter is not enough to confirm fitment.
- Inspect the retaining parts and seals during removal as worn or damaged surrounding components can affect temperature control and cartridge seating.
Installation Note
Use WRAS approved silicone grease sparingly on the cartridge o-rings during installation to help the cartridge seat correctly and protect the seals. Do not use mineral oil based grease on rubber seals or o-rings.
Related Spares You May Need
- TACSIL 3g Premium Cartridge Silicone Grease - WRAS Approved - for lubricating cartridge o-rings during installation.
- ZUCCHETTI R98884 Fixing Ring Asssembly - fixing ring assembly associated with the same verified Zucchetti valve assembly.
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.
Payment methods
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- American Express: available via PayPal guest checkout only
- BACS bank transfer
- Cheque: dispatch takes place once payment has cleared
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