I noticed a few weeks ago that the transparent flow meters for my underfloor heating have started turning black from what i presume is bacterial growth in the underfloor heating pipework.
I suspect this may be due to me draining the above floor radiators a few times when i've moved radiators etc and refilling the system with inhibitor, but no anti bacterial additive.
What do i need to do to kill and flush this muck out of the system? Can i just dose it up with anti bacterial additive like fernox F7 and leave it (i can cope with the flow meters being a bit mucky internally) or do i need to flush and refill the underfloor pipework?
I suspect this may be due to me draining the above floor radiators a few times when i've moved radiators etc and refilling the system with inhibitor, but no anti bacterial additive.
What do i need to do to kill and flush this muck out of the system? Can i just dose it up with anti bacterial additive like fernox F7 and leave it (i can cope with the flow meters being a bit mucky internally) or do i need to flush and refill the underfloor pipework?