How do you drain down a sealed central heating system?
I need to widen the pipes ready for a new radiator but have been told the sealed heating system can be tricky or cause damage to the new combi if not drained right.
What is a VPN?
VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).
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