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Frequently Asked Questions
What does it do to the water?
Applies a field as water passes.
Intended to change how hardness crystallises.
Into loose particles rather than scale.
Nothing is added or removed.
The water leaves chemically unchanged.
Why would anyone choose one?
No consumable and no chemical.
No salt, no waste water, no drain.
Electronic types need no pipe cutting.
Nothing enters drinking water.
And it runs on a few watts.
Does it work?
The evidence is genuinely mixed.
Independent testing ranges from benefit to none.
Results depend on water chemistry and flow.
On pipe material and temperature.
Which is worth saying plainly.
How should I read performance claims?
As conditional, and be sceptical otherwise.
A claim with no stated conditions.
Is describing a best case as a rule.
Ask what water it was tested on.
And at what flow and temperature.
Where is it a reasonable choice?
Moderate hardness, domestic system.
Where the cost is low and so is the risk.
If it underperforms you get limescale.
Which you were going to get anyway.
That is a fair bet at the price.
Where is it not?
Where scale is expensive or dangerous.
A commercial boiler or process plant.
Any steam system.
Use a treatment whose mechanism is settled.
Not one still being argued about.
Does installation position matter?
More than usual, and it is stated.
Distance from the appliance.
Distance from the heat source.
And the pipe material it is fitted to.
All affect whatever effect there is.