The 38 °C stop is a detent, not a safety device · review
A surface-mounted thermostat with a lockable 38 °C button and a plastic handle the maker defends on purpose — because limescale seizes metal ones.
The bottom line The thermostat to buy when the setting should stay set. The plastic handle is an argued choice rather than a saving, and the pressure figure is still missing.
A chrome surface-mounted shower thermostat with hot and cold connections 150 mm apart, a lockable 38 °C safety button, a separate flow handle and an outlet that takes any common shower hose.
Most thermostats on this shelf have a detent — a click the hand feels, released by pressing a button. This one can be locked with a key, so the limit is not passed by someone leaning on the handle. In a house with children that is a real difference.
It remains a temperature limit, not a scald-prevention device. Where genuine scald prevention is required, the device that provides it is a thermostatic mixing valve specified for the job.
The maker states two reasons: limescale seizes metal spindles, and metal is cold to hold in winter. Both are true, and it is unusual to see a maker defend a plastic part instead of ignoring it.
It is still the part your hand pulls on every day.
Minimum operating pressure. On a thermostat, that is the figure that decides whether it holds a temperature on your system at all.
On sale from 50 € to 57 € on the German, French, Italian and Spanish Amazon stores at the time of checking.
Also on sale on the British Amazon store, in the local currency: the range above is measured on the euro stores only.
Not found on the American Amazon store, where the buy link falls back to a local search rather than to a page that does not exist.
Prices and availability are what Keepa reported on the date this page was updated; both move.
Prices quoted in this text were read on 5 September 2026. The live price is at the top of the page.
| Centre distance | 150 mm between the hot and cold connections — stated |
|---|---|
| Minimum operating pressure | Not stated by the maker |
| Temperature stop | 38 °C safety button, lockable with a key — stated |
| Cartridge | Thermostatic cartridge — stated; type and diameter not given |
| Outlets | One outlet, stated to take any common shower hose |
| Finish | Chrome — stated |
| Amazon reference | B0FFSWJBM3 (same reference on 5 Amazon marketplaces) |
| EAN | 6979430721165 |
It fixes the limit so it cannot be pushed past casually. A detent that only clicks is released by anyone leaning on the handle; a lockable one takes a deliberate action. That is a real difference in a house with children.
It is, and the maker argues its side: metal handles seize with limescale around the spindle and are cold to hold. Both are true. It is also the part your hand pulls on daily, and plastic is where that eventually shows.
Shower thermostat · TurboStat cartridge · 38 °C detent · EcoJoy flow limiting with a release button · S-connections and metal rosettes
A thermostat built around a flow-limiting button you press to release full flow — and a water-saving claim published as a percentage with nothing behind it.
Best for: A household that wants a lower default flow without having to think about it, on a known standard wall installation.
≈ £105 / 96 €
Shower thermostat · 150 mm ±12 centres · G1/2 DN15 · SafetyStop 40 °C · EcoStop 10 l/min first position · silencer fitted
A thermostat that publishes its centre distance with a tolerance, its limited flow in litres per minute, and a built-in silencer — three things nothing else on this page states.
Best for: An existing wall installation whose centres are close to but not exactly 150 mm, in a bathroom where shower noise carries.
≈ £138 / 111 €
Shower thermostat · solid brass stated · 38 °C detent · ½ in hose connection, no adapter · 2 rosettes and 2 S-connections
A solid brass thermostat that arrives with its rosettes, its S-connections and its fixings, from a German maker who answers the phone.
Best for: Replacing a shower mixer on existing wall connections, where everything should arrive in one parcel and the maker should be reachable.
≈ £65 / 61 €
