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Fernox F2 stopped the gurgling noise in our boiler first day it was put in the system.. But the header tank filled up with black slurry after two weeks which had to be cleaned out not flushed as the slurry would have gone back into the system.
Verified purchase: Yes | Condition: New
I used this Fernox F2 Silencer in conjunction with F1 Protector after using F3 Cleaner. The result was amazing, previously our boiler was waking up our next door neighbour each morning when it started up, now it’s silent even on our side of the party wall.
Verified purchase: Yes | Condition: New
Good product I have an indirect system and it has reduced the boiler noise. It also has reduced the noise generally in the overall system
Verified purchase: Yes | Condition: New
Great product! Far superior to any other inhibitor. Added to my kitchen rad (part of a 14 rad system) and it killed all kettling in the boiler almost immediately.
Verified purchase: Yes | Condition: New
It did a great job of totally silencing the rushing water noises in our Vaillant boiler, I did not think this could possibly work but it certainly did a great job and well worth the cost to me.
Verified purchase: Yes | Condition: New