I have a 10 rad sealed system with a Vaillant Ecotec plus 418 boiler. Although the system had been powerflushed about 3.5 years ago prior to converting it to a sealed system, before the new boiler was fitted two years ago, I removed all rads and physically flushed them out, added some Sentinel cleaner to the system, ran it for about a week, drained and flushed several times and then when the boiler was fitted I added 1 litre of Sentinel X100.
I've just given my magnetic filter a clean out - no particles came out and system water is crystal clear. I have some litmus paper and checking the PH, it showed a reading of 9. My mains water showed a reading of approx 6.5. Reading the installation manual it says the PH should be between 6.5 and 8.5.
So, how do I get my system to a PH of 7.5? More inhibitor? - I have another 1 litre container of X100 - or shall I drain some system water off and refill with mains water? Or am I just flapping over nothing and should I just leave it alone?
I've just given my magnetic filter a clean out - no particles came out and system water is crystal clear. I have some litmus paper and checking the PH, it showed a reading of 9. My mains water showed a reading of approx 6.5. Reading the installation manual it says the PH should be between 6.5 and 8.5.
So, how do I get my system to a PH of 7.5? More inhibitor? - I have another 1 litre container of X100 - or shall I drain some system water off and refill with mains water? Or am I just flapping over nothing and should I just leave it alone?