How to top up pressure on (your boiler make & model)
?
May 2018
Jane
It would help no end to have at least a tiny idea what you are talking about.
It would appear to be a central heating boiler but that's only a guess.
One would suggest you find the make and model and Do a search for the installation manual and the users manual, which should tell you how to repressurise.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix home heating systems.