SGN have just moved my gas meter from a recessed enclosure to a semi buried unibox style enclosure which sits 75mm in the ground.
The input pipe is plastic and the oulet will be copper (when its finally connected up). The sleeve for the gas pipe through the cavity wall is already in place and comes though the wall just above where it will join the old black iron pipe in the floor screed. This will be behind a box that will hold the cistern for a toilet so wont be accessible.
Questions:
* Does this need bonding as the supply is plastic?
* Is the black iron in the screed effectively the same as the supply being in metal so bonding is required?
* As the bond wouldn't be accessible for the short length of internal exposed pipework behind the box is it acceptable to drill a hole in the unibox and insert a stuffing gland for the bond to go through or should the enclosure not be drilled in any way?
The input pipe is plastic and the oulet will be copper (when its finally connected up). The sleeve for the gas pipe through the cavity wall is already in place and comes though the wall just above where it will join the old black iron pipe in the floor screed. This will be behind a box that will hold the cistern for a toilet so wont be accessible.
Questions:
* Does this need bonding as the supply is plastic?
* Is the black iron in the screed effectively the same as the supply being in metal so bonding is required?
* As the bond wouldn't be accessible for the short length of internal exposed pipework behind the box is it acceptable to drill a hole in the unibox and insert a stuffing gland for the bond to go through or should the enclosure not be drilled in any way?