Fernox231159 62234 F1 Filter Fluid Plus Protector, Clear, 500 ml

Difficult to be able to be specific where this product is concerned. I sincerely hope that it does exactly what it says on the tin (OK, it's not really a tin), in that it protects my system from the various nasties that can get into my filter, which itself is professionally cleaned annually.I applied it through the blanked-off inlet, situated on the opposite corner of one of our radiator's bleed valve. Obviously, I had to drain the rad first. Tricky perhaps, but it saved me going up into the attic, and applying it via the header tank. I'm getting too old for that! That's a young man's game...

The area to be cleaned is gundgedup and needs clening properly. If it protects as well it willdo the job nicely

Reliable brand

Recommended - hardest part is filling the heating system - works well and prevents sludge / Hydrogen gas building up in the system and forming air locks in the pipework.

Used for many years what more can I say

Very good product

Had my system professionally flushed and had a magnaclean atom installed. The professionals topped it up with some unknown brand of inhibitor claiming they're all the same. I wanted to add a name brand product to my system and stumbled across this. Since there already was inhibitor in my system this made sense as it was an inhibitor plus dispersant and it would help get the best out of my filter so I popped into my local screwfix as it was cheaper there bought a bottle plonked it into the towel rail after removing the bleeder nut and pumping out some water with a tube and pump. I reckon you could siphon off some water as well if you had just a tube. Put this in and ran the system for a couple of days. Cleant the filter today and was surprised at the stuff that came out even after a recent powerflush, it even picked up flakes not just the powdery magnetite. That certainly cant be good for your boiler. Will be cleaning my filter weekly now until the amount of debris reduces. Would certainly not recommend using this without a filter you wouldn't want the stuff it dislodges getting into your boiler.