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Can anyone advise me if the auto air vent that sits near the hot water storage tank in airing cuboard should be open or closed during normal operation? I know it should be open when draining/filling the system but am not sure whether leaving open is contributing to air being drawn into the...

I need to change the automatic air vent completely and wondered how I should go about this as I have just added inhibitor to the system so don't want to dump it all. Someone I was speaking to recently said that if I drain the system down to that highest point I should be alright without...

Does anyone out there know any problems associated with X400 sludge remover and X100 inhibitor if mixed together? Only asking because this is what I recently added to my CH system and after flushing the system through about 3 times I then added X100 inhibitor. Since then though, I'm still...

I recently changed my pump (Grundfos UPS 15-50) and followed the correct procedures i.e drained system throughly, flushed out all the crap and added Sentinel X400 sludge remover and run the system for about 3 hours and then re-flushed. After adding Sentinal X100 inhibitor I have found that when...