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Internal drainage — Drain and sewer service
Show the affected rooms and fixtures and explain whether the issue is leakage, poor discharge or a proposed layout change. Indicate boxed-in pipework and occupied areas so access and making-good can be considered before a route is agreed.
Service scope
Waste and soil pipework within a building, including fixture branches, stacks and associated access or ventilation interfaces. The task may be installation, alteration or repair and must be distinguished from below-ground sewer work and clean-water supply pipework.
What is normally included
- Internal waste-pipe alterations
- Repairs to accessible drainage connections
- Coordination of stacks and fixture branches
What is not included
- Automatic redesign of the external sewer
- Unspecified fire or acoustic certification
Typical tasks
- Review fixture and stack layout
- Identify internal pipework defects or changes
- Coordinate access and building interfaces
- Complete the specified internal work
- Check discharge and document access points
What to include in your brief
- Fixture and room layout
- Pipework photographs
- Leak or discharge symptoms
- Concealed sections
- Required finish and occupancy constraints
Choosing the right professional
Ask how the provider will coordinate maintenance access and any floor or wall penetrations. Confirm responsibility for making-good and specialist fire or acoustic details rather than assuming the plumbing visit covers every building requirement.
Important considerations
- Concealed leaks can affect finishes beyond the visible pipe
- Unplanned penetrations can disturb other building systems
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