Approved Document G - Hygiene

Approved Document G
(download from Planning Portal)

MAIN CHANGES IN THE 2002 EDITION

This edition of Approved Document G, Hygiene, replaces the 1990 edition. The main changes are: -

1. Renumbering: the previous requirement G4 has now been renumbered G1.
2. Kitchen separation: the guidance has been amended to make it clear that a lobby is not required to separate a space used for the preparation of food (see paragraph 1.2).
   

   G1, 2 and 3

3. References: reference is made to European Technical Approvals (e.g. under G1 & 2 for macerator and pump small-bore drainage systems). Reference is also made to the National Accreditation Council for Certification Bodies (NACCB).
   
   G3
4. Installation of unvented hot water storage: requirement G3 has been amended by the addition of a stipulation that an unvented hot water storage system "shall be installed by a person competent to do so".
5. Notification: the 1992 edition reinstates the need to notify a local authority of intention to carry out building work or make a material change of use by submitting a building notice or by deposit of plans with respect to work which consists only of the installation of an unvented hot water storage system.
6. Systems up to 500 litres and 45kW: previously, factory made systems could have been supplied:
   i. without a thermal cut-out where the primary heater was to be connected to a low head vented primary circuit.
   Ii. with the thermal cut-out connected to a remotely sited boiler when fitted by or under the supervision of a member of the Confederation for the Registration of Gas Installers.
   
   It is now recommended that only proprietary units or packages that have appropriate factory fitted safety devices to satisfy the requirement of G3 are installed, to ensure that such systems are suitable for all situations.
   
7. Qualifications: guidance is included on the qualifications that should be acceptable to meet the requirement for competence to install unvented hot water storage systems (see paragraph 3.8).
8. Discharge pipes: additional guidance is given on the installation of discharge pipes and a diagram, table and worked example have been included to aid correct sizing.
9. Inspection: guidance is given on where inspection of unvented hot water storage installations may be necessary.