coffeealex Just one other curiosity. Whats your views on using osmio zero with the remineralisation cartridge left in, as opposed to a blank one. I appreciate it is reintroducing minerals back in, but do you feel it would as a result ( in general) lead to the likelihood of scaling?
You need to know the water temperature, the hardness from Mg and Ca as CaCO3 and Alkalinity as CaCO3 in order to answer your question. Since the information isn’t present it’s not possible to answer the question and there’s no way of knowing what the mineral composition of the water will be with or without the remineralisation filter in your specific case.
Unfortunately, without Osmio revealing what is actually in the remineralisation cartridge with clarity there isn’t a way of quantifying an increase in scaling potential by using it as you don’t know what the additional alkalinity is coming from. You can say that there will be some bicarbonate alkalinity left in the water after RO and therefore any added Calcium or Magnesium will potentially cause some incalculable amount of scale in a service boiler, if not straight away then eventually, without flushing. You can say that assuming the remineralisation filter doesn’t add any carbonate alkalinity as any carbonate alkalinity present with precipitate as scale along with some hardness when non-carbonate alkalinity rises enough.
I think people who have tested water without the remineralisation filter have reported alkalinity around 20mg/l but it will vary depending on the water you put in.