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Unvented Hot Water Storage System

Exam revision materials for Plumbing Level 2&3 and ACS Gas Safety test

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Regulations

Building Regulations

Approved Documents

Approved Document G Part L Part P
  • Building Regulations Document G
    • Section 2 - Water Efficiency
      • MAX daily internal usage - 125L
      • 5L - external usage
      • Water Efficiency Calculator
    • Section 3 - Hot Water Supply and Systems
      • Should incorporate MIN 2 independent Safety Devices
      • MAX delivered temperature is 48°C
      • Safety discharge
        • Calculate the diameter of the discharge pipe
  • Approved document L - Conservation of fuel and power
    • Recovery time of HWSC [BS 7206]
  • Water Supply (Water Fittings) Regulations 1999
  • 1986 Water Byelaws - accommodating of the expansions
  • Manufactures Recommendations
  • Code of Practice Benchmark 30 - commissioning of hot water system
< Go Back2014-04-06

British Standards

  • BS6700:2006 - Design, installation, testing and maintenance of services supplying water for domestic use within buildings and their cartilages
  • British Board of Agrement BBA - approved testing body
  • BS 6283 - Safety and control devices for use in hot water systems
    • Part 2 - Specifications for temperature relief valves (pressures from 1 bar to 10 bar)
    • Part 4 - Specification for drop-tight pressure reducing valves (of nominal size up to and including 12 bar)
  • BS 6282: Part 1 - Devices with moving parts for the prevention of contamination of water by backflow
  • BS 6144 - Specification for expansion vessels using an internal diaphragm, for unvented hot water supply systems
  • BS 3955: Part 3 - Specification for electrical controls for household and similar general purposes
  • BS 7206 - Specification for Unvented Hot-water Storage Units and Packages (or be approved by the British Board of Agrement)
  • BS 7291 - Thermoplastics pipe and fitting systems for hot and cold water for domestic purposes and heating installations in buildings
< Go Back2014-04-06