Are there any products on the market that you can install to only let in a preset amount of water into the bath once the tap is opened? If it resets once the tap is closed that would be perfect.
Alternatives would be a timer or a bath with an inbuilt float valve somehow…
Sometimes the install doesn’t allow for a neat overflow, or the overflow is slower than the rate of water coming in.
I have only seen overflows. These should be able to cope…
Have you checked that the overflow isn’t kinked…
This is for a new bathtub install. It’s going to be a freestanding bath, in a bedroom, upstairs, on a wooden floor. An overflow is the last thing I want, looking for a smart way to make it almost impossible.
Ok. Check this level controller: Other Electronics - Controller Water Liquid Level Sensor 220V + 2m Probe **LOCAL STOCK** for sale in Cape Town (ID:511596065)
The sensor will need to be mounted at the high level cutoff. I hope it isn’t too unsightly 
Maybe something like a solenoid value coupled with a sensor at a certain level in the tub could work (in the hole where the overflow would be? Then at least you can cut off the water once it reaches the “full” level?
just use the same system a washing machine uses to shut off a preset amount of water. its not that difficult to install.
Great idea! You might need to adjust the pressure switch to get the correct level… (They are preset for a particular pressure equivalent to a depth of water…)
I would say that an overflow is the only proper solution. I would hate to have a ruined floor because some microcontroller had a software issue.
Is it really impossible to have a hidden overflow? The most common kind I’ve seen is hidden underneath the spout, like this:
Just remove the ugly chain…