3. Order of August 2, 1977 modified
The amended order of August 2, 1977 (see
on the one hand, for all new installations in new and existing buildings;
all additions or modifications to existing installations.
The provisions of the decree cover pipelines and their accessories (shut-off devices, pressure-reducing devices, shut-off valves, insulating fittings) from and including the general shut-off device to appliances and their discharge devices.
3.1 Pre-meter installations
Pre-meter installations are those between the upstream connection of the general shut-off device...
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Order of August 2, 1977 modified
Use of domestic installations
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DTU composition
The DTUs are mainly :
technical specifications (CCT), originally known as "cahiers des charges", which set out the technical conditions to be met by contractors in selecting and using materials for the various trades;
calculation rules that enable structures to be sized according to operating conditions or construction sites;
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