How to repressurise or fill a combi boiler or sealed central heating system
25 Responses to “How to repressurise or fill a combi boiler or sealed central heating system”
Leave a Reply
Thu, Jul 29, 2010
How to repressurise or fill a combi boiler or sealed central heating system
July 29th, 2010 at 3:40 am
Cheers fella, helped me out a load
July 29th, 2010 at 4:07 am
@schmike20
If the valve passes the boiler will over pressurise and stop working.
It’s a water bye-law, but to be honest most people keep it connected.
Thanks for the comment!
July 29th, 2010 at 4:45 am
Thank you so much, just saved me a small fortune and a lot of grief off the wife! Just out of interest, why is it a legal requirement to remove the filling loop? Ours was attached when we went in 2 years ago and I never thought to remove it. Thanks again.
July 29th, 2010 at 4:53 am
Thanks Bud will come in handy :
July 29th, 2010 at 5:15 am
thanks for sharing!!
July 29th, 2010 at 5:44 am
@benjamin308
Glad it helped. Can’t do much about the accent though, I am stuck with it lol.
Thanks for the comment.
July 29th, 2010 at 5:46 am
Thanks. Was a huge help. Fascinating accent by the way.
July 29th, 2010 at 6:44 am
@johnh99999
Most people leave them connected, including most plumbers.
Thanks for the comments
July 29th, 2010 at 7:17 am
@johnh99999
Thanks again! I’ll tell my plumber!!!
July 29th, 2010 at 7:22 am
@johnh99999
If it is left connected and the valve passes the boiler will over pressurise and stop working. Also as you mentioned contaminated water could potentially be syphoned back into the cold water supply in extreme circumstances.
July 29th, 2010 at 7:57 am
@ultimatehandyman
What’s the problem with leaving the filling loop attached? Is it to prevent water that has circulated for a long time entering the mains water?
It’s the only thing I can imagine – maybe a source of legionella bacteria as the bacteria can feed on rust??
July 29th, 2010 at 8:49 am
@johnh99999
You are welcome!
July 29th, 2010 at 9:39 am
Thanks.
July 29th, 2010 at 10:28 am
hey, i like ur videos and u deserve ur title (ultimate handyman)
July 29th, 2010 at 11:14 am
@disleyhd
You are welcome.
Thanks for the comment!
July 29th, 2010 at 12:02 pm
just like to say thanks a million you have saved me a lot of distress all working fantastic now–cheers
dis disley
July 29th, 2010 at 12:49 pm
@brookyagb
It varies from boiler to boiler, but the pressure normally increases when the boiler is hot.
July 29th, 2010 at 1:04 pm
What is a typical pressure when the boiler is hot? Right now ours is running at about 1.1 bar hot. I’m not sure the cold pressure yet.
July 29th, 2010 at 1:52 pm
@ offroadell
I can see the logic in what you are saying, it would make more sense to have the check valve at the combi side of the filling loop. But I guess the regulations are more concerned with backflow prevention and if the check valve was on the other side, there is a chance that someone could connect something that could cause backflow.
Thanks for the kind comment.
July 29th, 2010 at 2:51 pm
I have a question, that check valve (one way valve) i reckon that should be on the other end of that filling loop, as you know the heating system is under pressure, and if wrongly tampered with, would discharge hot water, but if fitted with the non return valve it would be safe, i reckon you are right to pressure to 1 bar as opposed to 1.5 cold as many boilers request, i prefer to run at the lower pressure. Keep up your excellent work, you are clearly a nice guy.
July 29th, 2010 at 3:31 pm
@ theriotact07
I’m glad it helped you. Thanks for the comment!
July 29th, 2010 at 4:08 pm
Thanks very much, just sorted my boiler out without having to ring my swine of a landlord. Much appreciated.
July 29th, 2010 at 4:10 pm
You are welcome.
Thanks for the comment!
July 29th, 2010 at 4:22 pm
Thanks for the info.
July 29th, 2010 at 4:49 pm
@ brookyagb
It is part of the water bye-law regulations. If you do not remove it and the valve passes it will over pressurise the boiler and it won’t work again.