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Plumbing Processes

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

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Plumbing Materials

Plastic Types

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  • Thermosetting plastics – can be heated once
  • Thermoplastics – most pipework

  • Acrylonitrile Butadiene Styrene ABS (black) – mechanical, solvent, push fit
    • Small diameter waste and discharge pipes
    • Withstand high temperatures for long
  • Polythene (black) – mechanical, fusion
    • underground water mains, blue; internal cold water, black
  • Polyethylene (blue) – mechanical
    • MDPE – water mains; afraid UV
    • underground water mains, blue; internal cold water, black
  • Polyvinyl chloride PVC (white) - mechanical, solvent, push fit
    • Withstand high temperatures for short
    • Will sink in water
    • For drainage and waste
  • PVC-U (white) – mechanical, solvent, push fit
  • Polypropylene (white) – mechanical, fusion, push fit
    • Withstand high temperatures; boiling water for short
  • Plastic for waste and soil
    • Polypropylene - traps
    • Polyvinyl chloride PVC - pipes
    • Acrylonitrile Butadiene Styrene ABS – higher temperature
  • Plastic for supply pipes
    • Polyethylene PE
    • Unplasticized Polyvinyl chloride PVC-U – under roads
  • Plastic for hot and cold water
    • Chlorinated Polyvinyl Chloride PVC-C – solvent
    • Cross Linked Polyethylene PE-X – NO solvent
    • Polybutylene PB – NO solvent
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