Meldrew You could, yes. You wouldn’t completely eliminate either descaling or regular flushing (service boiler only). With use even a harness of 22mg/l would rise quite quickly in a service boiler.

      Rob1 Thanks Rob. Much appreciated. Need to monitor water quality and decide if to get the RO.

        8 days later

        Rob1 Hi, so I’ve just done 2 alkalinity drop tests (as I couldn’t believe the first one) and I’m getting a dKH of 0.3 which I think is 0.1071 meq/L or 5.366ppm CaCO3

        What would you recommend the alkalinity be, I assume a bit higher than this?

        • Rob1 replied to this.

            Gav86

            For taste I like between 40-50mg/l. The water will be on the corrosive end of LI. I can’t comment on how much you should be concerned by this, if at all, water will either be scale forming or corrosive at different temperatures, you basically have to decide which way to go. I may decide to go for water that is really good at brew boiler temps but scaling at service boiler temps…..or I may try and find a way of getting hardness and alkalinity without scaling potential (alkalinity would have to come from non-carbonate sources).