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Seal your services to pass your Air Tightness Test

Here are some examples of how to seal your services to pass your air tightness test

Kitchen

Start in your kitchen. Before they install the kitchen units, check the following pipes are sealed when they pass through the wall or floor:

  • Drain pipe (serving your sink or dishwasher)
  • Incoming water pipe (through the floor, this will leak)
  • Soil pipe – usually in the corner, around 100mm diameter. Seal the base and seal the top where is passes through the upper floor and roof ceiling

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Bathroom

In the bathroom, you have a series of water supply pipes, drainage pipes and then the main drainage stack pipe. Consider sealing the following as they pass through the wall, floor or ceiling:

  • Drain pipe (serving your bath, shower and wash hand basin)
  • Water pipe (through the floor, this will leak air)
  • Soil pipe – usually in the corner, around 100mm diameter. Seal the base and seal the top where is passes through the upper floor and roof ceiling.

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Foam up around waste pipes passing through the wall or use a grommet

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Use a pattress and seal around the pipe to reduce air leakage.

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