New update 2026-06-07. Silence in the water
This is more on the playground side to honour the name of the driver.
If for any reason you want to disable the siren of the new IKEA KLIPPBOK water leak sensor I’ve added support for its silent mode. You can also physically remove the internal speaker but where is the fun in that!
Probably makes sense for use cases where you expect it to get wet and don’t want the siren to annoy you or others but still be notified. If you don’t care about silent mode keep using stock driver, does not add anything else and if something goes wrong with a leak I prefer if you sue SmartThings 
Alarm Type options
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Audible siren is the default alarm type: the built-in siren will sound on leaks, the LED will blink and automations will run.
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Silent disables the built-in siren, will not sound on leaks. The LED will still blink and it will notify the sensor state to the platform so you can run automations normally.
Auto-revert behaviour on power loss and workaround
Found a couple bugs in current 1.0.13 firmware that I reported at reddit and hopefully will get to IKEA via their official representative.
The device does not persist the configuration and reverts the alarm type after a power loss and maybe other scenarios. After replacing the batteries, it will go back to Audible siren type.
The driver does not change configurations on its own, only writes the type when you explicitly change the Alarm Type manually or with an automation. Also, the alarm type shown is the one reported by the device so it is always in sync.
To work around the auto-revert so it is always in silent mode, feel free to create a routine like “If Alarm Type is Audible Then set Alarm Type to Silent”. I’ve tested and it works as expected.
As usual, I recommend testing that everything works after changing the alarm type.
And, again, if you don’t care about the silent mode or just prefer to cut the internal speaker as other users have done, stay with stock drivers.