There is no requirement for bonding a boiler; it is earthed. Supplementary bonding is not required in a kitchen. However, this is a favourite with plumbers because they do not understand.

Is earth bonding still required?

Supplementary equipotential bonding (between waste pipes, metallic service pipes and earth connections of bathroom equipment) is no longer required if, and only if, the main bonding between metal service pipes can be proved to be continuous.

Does gas need to be earthed?

As of 2008, earth bonding is a legal requirement for any electrical installations in rooms that contain a shower or bath. … If you’ve been advised that you need this by gas or electrical engineers, it’s because it is fundamental to the safety of the entire electrical installation.