The plumber must be in prison as well.
G3
"This scheme covers the inspection, installation, commissioning and servicing of unvented hot water storage units and packages. This includes the electrical supply arrangements for direct heating, i.e. immersion heaters and the component requirements for indirect heating."
http://www.citb.co.uk/awards/qualif...gineering/unvented-hot-water-storage-systems/
G3
"This scheme covers the inspection, installation, commissioning and servicing of unvented hot water storage units and packages. This includes the electrical supply arrangements for direct heating, i.e. immersion heaters and the component requirements for indirect heating."
http://www.citb.co.uk/awards/qualif...gineering/unvented-hot-water-storage-systems/