Our boiler has just started "kettling" after the system was drained to replace a radiator. The plumber suggests adding a noise inhibitor to the system. What is the best way to do this? Can it simply be added to the header tank?
If you put it in the header tank you need to drain enough water from the system to empty the tank plus a bit then add the chemical then refill the tank. You can get cartridges which inject into radiators (expensive), but I squirt it up a drain cock (after making sure the cock works properly, The washers usually stuck to the seat.)
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