How to Fix a small Leak in a Heating System - Adding Leak Sealer

Have you ever had a small leak in your Central Heating System which requires you topping up the water every so often, but you have no way of identifying where the leak is? If so, then this video is for you.
Firstly, try and identify where the source of the leak is, this could be a wet patch on a ceiling or rusted/corroded radiator thermostats. If you are unable to locate the leak, then unfortunately you either need to get a Plumber out at great expense (if the leak is severe and requires daily top-ups). Be warned though, even if a plumber is called out, they could end up ripping up floorboards or cutting holes in ceilings.
If the leak is subtle, then perhaps this video will help you, it definitely fixed my leak and two months on I've still not had to top-up the water in the boiler.
In this video, I will show you a simple DIY method of applying Fernox Central Heating Leak Sealer F4 Express via a Magnetic Filter (a radiator inlet can be used as well)
I will start with isolating the boiler, then continue with draining the system and finish with applying the Fernox Leak Sealer to the system.
Links to the items used in this video:
◉ Fernox Central Heating Leak Sealer F4 Express: amzn.to/4bn5CwI
◉ Mini Bucket: amzn.to/3UHlDqg
◉Thin nose pliers: amzn.to/3UHlDqg
or amzn.to/4bKNahh or amzn.to/3V8wYB6
Have you faced a similar problem? Give this video a try and let me know if this fixed that hard to find small leak in your Central Heating system. Also, share your thoughts on any other ways to fix or detect a small leak in the hidden pipework in the comments section below
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Thanks for watching, see you Savages on the next one

[@TprDjd21]

Also, if you’re doing it via the Omega filter like that one, screw the magnet out the top first before you drain it, to release all the sludge, otherwise the inhibitor will be stuck amongst it all. Good informative video though!

[@HandymanSavage]

Thanks, appreciate the feedback, I usually get the magnetic filter cleared out when i get the annual boiler service, but i'll remember to do that before applying the Fennox next time.

[@paulpablo7810]

can leak sealer obstruct pipes reducing flow

[@HandymanSavage]

Not according to this - fernox.com/product/leak-sealer-f4-500ml/#:~:text=Effective%20within%201%2D24%20hours,as%20pumps%20and%20safety%20devices.

[@TprDjd21]

If it’s every 3-4 weeks you’re just looking at a flat expansion vessel or passing PRV on the boiler not a leak mate

[@HandymanSavage]

I've had the boiler and expansion vessel checked a couple of times, all plumbers said it was a leak in the radiator piping somewhere, but so far this solution has plugged the leak wherever it is. Do you know of any methods to pinpoint where in the system the leak could be? I've had leaks where a patch on a ceiling has revealed the location, but this current leak did not show any obvious location.