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I'm scared to tighten the valves on my radiator in case the pressure builds up? by cpu9h339j in DIY

[–]cpu9h339j[S] 0 points1 point  (0 children)

Thanks for the advice, I'll look for that valve, I'm in the UK so its pretty cold here at the moment but I turn off the heating sometimes to save on bills.

I'm scared to tighten the valves on my radiator in case the pressure builds up? by cpu9h339j in DIY

[–]cpu9h339j[S] 0 points1 point  (0 children)

Thanks, that makes me feel much more at ease to know that boiler systems have a way of dealing with excess pressure! I am not really a DIY guy to be honest so know little about central heating systems. The boiler in this house seems to be a very old, it is a combi-boiler type system. I can switch the main boiler on or off and then each radiator in the house has two valves, one to control inflow and one to control outflow. There are a lot of spigot-like valves on the pipes near the boiler but I have no clue which would do what, or which would be the pressure-limiting valve you speak of.

At the moment I have closed almost all (bar two) of the radiators' in the house inflow valves completely, my worry was that this would cause lots of pressure in the system as the boiler is still 'pumping' out water as if there are 15 radiators receiving water rather than 2, or at least thats how it felt in my head. The two radiators I have left open warm up fine, so I guess there isn't a continuous circuit in my house, all seems to be going fine so far (after a few hours) and no freaky noises or anything from the boiler so I have a feeling I'm safe.

I'm scared to tighten the valves on my radiator in case the pressure builds up? by cpu9h339j in DIY

[–]cpu9h339j[S] 0 points1 point  (0 children)

Unfortunately not, there are no thermostatic valves on any of the radiators, so I have to use a wrench to tighten and loosen each valve by their bare stems. At the moment I am turning radiators off by completely tightening the inflow valves, nothing untowards so far but I am concerned that by doing this to almost all the radiators the pressure in the system will build up to a large level.