There's a plumbing device that can save water, but it's not available in Australia, as far I know.
It's called a "Shower Head Control Valve", which is installed between the shower wall outlet & the shower head. It's purpose is to save water while massaging shampoo through hair, or shaving while in the shower.
Thing is, it can't/doesn't shut the flow off completely (plumbing regulations don't allow it), so you can throttle it to your desired flow rate, if the minimum is too drastic.
Once installed, it's not compulsory to use it, it's just there to use if you choose to. It doesn't just save water, it brings a minor saving on your water heating bill at the same time.
Those with instantaneous (non-storage) hot water services, may not find it attractive, as turning the water flow up & down, causes uncomfortable water temperature fluctuations.
Like with all products, there are the cheap knock offs, but even the highest priced quality ones won't break the bank, & are there if you choose to use it.
In our 2 person home, my wife wouldn't use it, & she doesn't have to, but I have the option to use it which suits me fine (I'm old school, so don't shave in the shower).
During the cold season, shower as normal, turn the control valve to your preferred flow while shampooing & shaving, as the cubicle will be warm from the showering leading up to it.
A sample glimpse of what I'm talking about:
So I urge Bunnings to set the scene by introducing this product, & hopefully make a killing, as Australian retailers aren't stocking them, & Energy Ministers are clueless. ; )
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This morning while searching on the Bunnings site, I discovered that the "Shower Head Control Valve" that I was intersted in, is called a "Flexispray trickle switch" & is indeed stocked at Bunnings :
Several things come to mind that I would like to see in Bunnings:
Many thanks for your feedback @Annette. I am happy to pass on any comments to the Bunnings merchandise team. Feel free to post other product suggestions.
Wow @Annette, you never cease to amaze me, I love your determination, resourcefulness, & your unique ability to source what you need, from places that I'd never even thought of.
I enjoy learning from YouTube, but you're a level above, thanks for sharing.