Słownik
- ABS pipe — Acrylonitrile butadiene styrene plastic pipe used for solvent-weld waste runs.
- Access cover — Removable lid over a manhole or inspection chamber providing surface entry to the drain.
- Acoustic leak detection — Use of sensitive listening equipment to detect sound of water escaping from a pressurised pipe.
- Adoption drain survey (s.104) — Survey of new drainage prior to adoption by a sewerage undertaker under section 104.
- Air admittance valve (AAV) — One-way valve allowing air into a drain system without releasing odours.
- Air test (drain) — Pressure test using compressed air to check the integrity of new drainage installations.
- Ambient cure lining — CIPP lining that hardens at normal ground temperature without heat or UV.
- Anti-syphon trap — Trap with built-in air inlet preventing loss of water seal during heavy discharge flows.
- APHC certification — Association of Plumbing and Heating Contractors trade body certification for UK installers.
- Approved Document H1 (foul water) — Guidance on the design of foul water drainage installations to satisfy Building Regulations.
- Approved Document H2 (wastewater treatment) — Guidance on small wastewater treatment systems and cesspools beyond mains sewer reach.
- Approved Document H3 (rainwater drainage) — Statutory guidance on surface water and rainwater drainage from buildings and paved areas.
- Approved Document H4 (building over sewers) — Guidance on building works that pass over or close to public sewers and lateral drains.
- Approved Document H5 (separate systems) — Guidance on the separation of foul and surface water drainage on new developments.
- Approved Document H6 (solid waste storage) — Guidance on the design of facilities for the storage of household and commercial solid waste.
- As-built drainage drawings — Drawings recording the drainage system as it was actually constructed, not just designed.
- Asbestos cement pipe (AC) — Legacy cement pipe containing asbestos fibres, common in pre-1980s drainage and venting installations.
- Asbestos contamination drainage — Drainage works involving asbestos-containing materials, with licensed asbestos contractors required.
- Attenuation tank — Underground tank temporarily storing surface water to reduce peak flows into the sewer.
