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Plumbing Principles

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

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Pipework

Pressure Loss

Pipe run pressure loss

The Earth surrounded by air to height of 7 miles which creates 1.013 bar on the surface

  • 3.0m/s - MAX velocity of water flow [BS6700]
  • Pressure loss per metre run of pipe scale
    Pressure loss per metre run of pipe
< Go Back2013-02-23

Pressure Loss through Float Operated Valve

Presser loss through float operated valve

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Pressure Loss Chart

  • use to determine the pressure loss per metre run of pipe
    Pressure loss chart
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Pressure Loss through Taps

Nominal size of tap Flow rate (l/s) Loss of pressure (kPa) Equivalent pipe length (m)
G½" basin 0.15 5 3.7
G½" sink 0.20 8 3.7
G¾" 0.30 8 11.8
G1" 0.60 15 22.0
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