Słownik
- Rainwater harvesting tank — Storage tank capturing roof rainwater for reuse in toilets, gardens or laundry.
- Rapid response drainage — Fast attendance for drainage emergencies, typically within one hour in urban areas.
- Recurring blockage — Drain blockage that returns repeatedly after clearance, indicating an underlying defect.
- Recycler (jet vac with water recycling) — Combined jet vac unit that filters and reuses recovered water for jetting.
- Reinforced concrete pipe (RCP) — Steel-reinforced concrete pipe used for adopted sewers and large diameter highway drainage.
- Residential property — Dwelling used as a home, including houses, flats and maisonettes across Greater London.
- Resin-bound paving — Permeable surface of stone aggregate bound with clear resin laid over a porous sub-base.
- Restaurant grease emergency — Emergency response to grease blockage in restaurant drainage, preventing kitchen closure.
- Restaurant kitchen — Commercial food preparation area with grease trap, trade effluent and high drainage loads.
- Retail unit — Shop or retail space, often with single WC and limited drainage to high street sewer.
- RIDDOR (Reporting of Injuries) — Regulations requiring UK employers to report specified workplace injuries and dangerous occurrences.
- Road gully — Highway drainage point with a kerb inlet collecting surface water from roads into sewers.
- Robotic reinstatement — Use of a robotic cutter to reopen lateral connections after a liner has been installed.
- Rodding eye (rodding point) — Capped access point allowing drain rods to be pushed into a pipe for clearing blockages.
- Root cutter nozzle — Specialist jetter nozzle with chain or blade attachments for cutting roots.
- Rubber gasket (drain joint) — Elastomeric ring providing a watertight seal in push-fit drainage pipe sockets.
