Planning on giving our CH system a clean out with X400 once the radiators go back on in a few weeks. Just over two years since a power flush but it's a very dirty system. I dredged out the header tank in the late Spring and it was heavily contaminated with brown scum and black sludge, which has already started to re-appear. Need to catch it before the cold feed gets blocked again which nearly ended up with the system having a meltdown, last time. I have read the brown stuff is possibly organic in origin, rather than metallic.
So... once the X400 has done its stuff and I drain and refill with nice clean water plus X100 inhibitor and X200 silencer, was thinking about how I can stop the water in the header getting dirty. One idea was to drop in a couple of chlorine tablets, the type you buy for water butts, which would hopefully suppress any bacterial activity. Would this though be liable to interfere with the X100/X200 in the system once the water starts to recirculate, i.e. I don't want a great big foaming mess coming over the top of the header tank and bringing down the upstairs ceiling.
Another option might be to double dose the X100, but essentially that's in the system not sitting stagnant in the header for much of the time.
Long term, the system probably needs replacing with a closed system - Swindon has some of the nastiest hard water in the country which, combined with metallic residue from the pipework creates a nasty primordial ooze in which bacteria thrive. However ATM, make do and mend is cheaper than blowing three or four grand on new CH.
So... once the X400 has done its stuff and I drain and refill with nice clean water plus X100 inhibitor and X200 silencer, was thinking about how I can stop the water in the header getting dirty. One idea was to drop in a couple of chlorine tablets, the type you buy for water butts, which would hopefully suppress any bacterial activity. Would this though be liable to interfere with the X100/X200 in the system once the water starts to recirculate, i.e. I don't want a great big foaming mess coming over the top of the header tank and bringing down the upstairs ceiling.
Another option might be to double dose the X100, but essentially that's in the system not sitting stagnant in the header for much of the time.
Long term, the system probably needs replacing with a closed system - Swindon has some of the nastiest hard water in the country which, combined with metallic residue from the pipework creates a nasty primordial ooze in which bacteria thrive. However ATM, make do and mend is cheaper than blowing three or four grand on new CH.
