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Approved Document G - GOV.UK
assets.publishing.service.gov.ukRequirement G3 – Hot Water Supply and Systems 7. ... Paragraph 3.60 of the Approved Document allows safety relief discharge pipes to connect ... No, sub-paragraph 3.13a simply requires that in a vented hot water storage system, “for all indirect heat sources, an overheat cut-out to disconnect the supply of heat to the storage ...