Checks and Accreditations

Miller & Sons hold the following certifications.


  • UHW10 domestic hot water storage systems
  • WREG - Water Supply (Water Fittings) Regulations 1999
  • CENWAT - Install, exchange, commission, disconnect, service, repair and breakdown of domestic gas fired central heating & hot water boilers and circulators, combination boilers, storage water heaters and instantaneous water heaters
  • CCN1 - Core domestic gas safety
  • CPA1 - Combustion Performance Analysis Natural Gas and Liquefied Petroleum Gas
  • CKR1 - Install, exchange, service, repair, breakdown and commission domestic gas cooking appliances
  • DCGS - Domestic Core Gas Safety
  • DCPA - Flue Gas Analyser
  • Domestic Central heating and water heaters
  • Domestic Fires
  • Domestic Cookers

City & Guilds Level 2 NVQ in Mechanical Engineering Services - Plumbing (Domestic) - 100/3284/8

City & Guilds Level 3 for Electrical Installations BS 7671 :2008 (2015) Awarded to Gregory Miller

Member of the Water Industry Approved Plumbers Scheme ( WIAPS )

Cert-ain Certification Ltd certificate of competence held

  • EE1 Energy efficiency for gas fired and oil fired wet central heating and hot water systems in domestic premises (non community heating systems)
  • OFT 10 101 Single Stage Pressure Jet Service and Commissioning
  • OFT 10 105E Installation of Oil and Bio Liquid fuelled fixed combustion appliances and systems
  • OFT 10 600A Installation of Oil Fuel storage and supply systems connected to fixed combustion appliances

Bpec Certification, AGSPR -Installation of Above Ground Sanitary Pipework & Rainwater Systems

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