Descaler is available from a number of places: ~ DIY sheds- ebay or your local plumbers merchants, various brands exist but generally all the same base.
The product is mixed with water (try the initial mix hot) goes a long way as it is generally added to the central heating system.
Once completed flush through a couple of times & then back to the antifreeze mix as normal.
Bob.
Last edited by Bob Meadows; Jul 14th, 2019 at 19:55.
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