62454 265ml Super Concentrated F1 Protector - 100 litres Treats

Very easy to apply and it definately helps to keep the central heating system working at peak performance

This is an essential protector to add to radiator systems to prevent rust and protect.Being concentrated, it's easy to add to the system. I'm using a dosing tool to do so. Add it in and it'll circulate and mix in the system fairly quickly.This is good value for a concentrate and easy to use. I also like the smell of it. The function of it is really good and we've been using it for years. It does also help quieten the system a little, from my experience and keeps ethi gs working as they should.Definitely recommended.

Treats the same size system, just a more concentrated form of the full-size product (I tend to buy whichever version is cheaper each year). Smaller amount to be added to the system means having to take less water out of the system to make room. You might even get away with not removing any if your system needs a lot of air bleeding out of it and you add this first (though I've never actually tried that, my system gets very little air in it)..As for effectiveness, I started with a clean system and the water has stayed clear for years with no hint of the black sludge that many systems have. This won't fix an already sludge-filled system - clean it first (or have it done for you), then top up with this every year and that should be the last clean your system needs for a very long time.

Great 👍🏻 👌 👍🏻

Added to existing system.

Top my system up once a year with this and 5 years down the track clear circulation fluid. Probably not required every year, but don’t believe overdose is an issue, at this size no wastage when dosing via a filter, which is the main drive for buying this concentration.Magnetic filter picks up once a trace amount of material.Gradually getting more expensive, who’d have thought it.

You can’t see what it does but on our 40+ year old 15mm copper system which had a new boiler fitted in ‘21 it has maintained performance and kept the circulating water clear. Very pleased.

I recently had to take a rad off a wall while having some work done, then replace it, fill it and bleed it afterwards (at least I didn't have to drain and re-fill the entire system). I'm also about to replace the towel rail, so I'll use a bit of this to top up inhibitor levels in the the system afterwards and keep the rest for later, next time I have to do a job and a system needs topping up.