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jef612 t1_iww85sk wrote

Just stop. Honestly you can do some pretty good damage to your system if you don't know what you are doing. You have a nice boiler there - someone in your area will be able to look at in the next week. Don't buy the labour shortage crap - keep calling until you find someone qualified to look at your system.

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Once the tech is on site - ask him to spend a few minutes with you showing you where you can add water to the system and what else you can monitor/maintain as a homeowner.

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Boiler systems are sealed, and if you are continually adding water then it has a leak somewhere that needs to be addressed. Adding small amounts of makeup water is OK, however adding water over time without addressing the leak will cause much bigger problems over time. Don't buy the labour shortage story - keep calling around.

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chunderilla OP t1_iwwcb0r wrote

I think the issue is that we just renewed all the radiators this summer so there must’ve been some trapped air in the system which is why the pressure’s dropped since I’ve bled some of the radiators.

Unfortunately, the labor shortage is a thing where we live right now. Even my neighbours have been complaining about the waiting lists they’re on or the ridiculous amounts of money you need to be willing to fork out just to make it worthwhile.

I think I will wait and see if either a professional can come by or if someone we know knows how this stuff works can guide me. Last thing I want to do is have to wait 6 months for a new boiler to be delivered and installed just as winter’s coming round

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jef612 t1_iwwg8ad wrote

https://viessmanndirect.co.uk/files//cf26e1c5-3b9f-43ed-980e-a31c00abe9a2/WS3C%20333-F%20Installation%20Service.pdf

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Page 8 shows you the fill valve. You would have to trace from there to see where it is connected.

air locks can be tricky - you may still need a tech there

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chunderilla OP t1_iwy69fn wrote

Yeah I just read that and thought exactly the same! Thanks for the link!

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