Landlords/ budget boiler. Only done 2 etec 28's (while back so can't remember but think they are 7 year warranty?) Not had any bother with either of them and we ain't been back to service them so not sure if they are being done. We do the annual cp12 inspection so I know are both running well though.
Any experience with Alpha? Specifically Alpha Etec 33? I’m having one fitted tomorrow hence the question.. thanks
Honestly, ive never known of a problem with mixing inhibitors but I really wouldn't advise it. If at all possible, try drain the system and start afresh. Then you know what is in and how much.
Brilliant info thanks very much. Would help to know what was put in by installer, no sticker or anything. I found there was no universal kit like you said online only specific products and different colour codes for samples, etc. Ridiculous prices too. I'll take your advice and top up each two years. Good to know you can not overdose at all. So different brands of inhibitor are okay to mix if you don't know what's in the system?