- May 28th, 2020, 11:15 pm
G3 unvented is a qualification to allow a plumber to repair, service or install unvented cylinders and their components.
It is a legal requirement in U.K. and is to hopefully have any of the above work safely carried out.
The unvented cylinders require a yearly service by G3 plumber to keep their warranty as well as unit fully functioning and safety, so best having it done.
Doing any unqualified work on unvented for a customer is definitely a no no