Glossary Terms – Greater London Drainage

Damp wall (rising damp) — Persistent ground moisture rising into a wall, sometimes linked to defective drainage nearby.
Detached house — Standalone single dwelling not joined to any other property, with independent drainage runs.
Diamond core drill — Powered drill with a diamond-tipped core bit used to cut through masonry.
Disabled access drainage emergency — Drainage emergency in disabled-accessible facilities, with awareness of mobility and equipment needs.
Displaced drain joint — Drain joint that has moved out of alignment, creating a step or gap inside the pipe.
Drain auger — Hand or powered flexible cable with a cutting head used to clear drain blockages.
Drain backfill (post-repair) — Compacted material replaced around a drain after repair or installation.
Drain bellies (low spots in pipe) — Localised low section in a drain where the pipe sags below the design gradient.
Drain CCTV report — Written report summarising findings of a CCTV drain survey with defect grading.
Drain cleaning chemical (bio enzymes) — Biological product using bacteria and enzymes to break down organic deposits.
Drain cleaning chemical (caustic) — Strong alkaline product used to dissolve organic blockages in drains.
Drain collapse — Structural failure of a drain pipe where the bore deforms or fractures, blocking flow.
Drain collapse emergency — Urgent response to collapsed drain causing flooding, sinkhole or total drainage failure.
Drain corrosion — Internal degradation of metal drain pipes by acidic gases, chemicals or biological action.
Drain depth gauge — Instrument used to measure invert depth at an inspection chamber.
Drain descaling — Removal of hardened mineral scale or rust deposits from inside pipework.
Drain digitised mapping — Digital map showing accurate drain routes, depths and components across a property.
Drain flies (sewer flies) — Small moth-like flies breeding in organic sludge inside drains, traps and gullies.
Drain freezing emergency — Emergency response to frozen external drains, with controlled thawing to prevent burst.
Drain heater (frost protection) — Heated element or tape used to prevent freezing in drainage pipework.
Drain heater hire — Hire of electric or steam drain heaters for thawing frozen drains during freeze events.
Drain insulation (frost protection) — Insulation of external drainage pipework to reduce the risk of freezing.
Drain locator (electronic) — Hand-held receiver used to detect signals from sondes and trace underground drain runs.
Drain mapping survey — Survey that traces and records drain layout, depths and connections across a site.
Drain measuring wheel — Wheeled device for measuring linear distance between drainage features.
Drain mice infestation — Mice using drains and waste pipes as a route between properties and the outside.
Drain milling robot — Robotic milling machine that grinds away hard deposits and intrusions inside drains.
Drain nozzle (backward jet) — Jetter nozzle with rearward jets used to propel the hose along the pipe.
Drain nozzle (forward jet) — Jetter nozzle with forward-facing jets to cut into blockages.
Drain odour mask — Respiratory mask worn to protect against drainage gas and aerosols.
Drain pipe replacement — Removal and renewal of a damaged section of drain by open-cut excavation.
Drain plunger — Hand tool that creates pressure waves to dislodge soft drain blockages.
Drain pump (submersible) — Pump submerged in a chamber or sump to lift wastewater or surface water.
Drain rats (rat infestation in drains) — Brown rats living in and travelling through drains, sometimes entering properties via WC pans.
Drain rehabilitation — Programme of works that restores a drain to acceptable structural and hydraulic performance.
Drain relining — Installation of a continuous liner inside an existing drain to renew its structure.
Drain robotic cutter — Robotic device used to cut intrusions and obstructions inside a drainage pipe.
Drain rod (Lockfast type) — Polypropylene drain rod with bayonet coupling resistant to unscrewing underground.
Drain rod tip (corkscrew) — Auger-style screw fitting on a drain rod for grabbing soft blockages.
Drain rod tip (plunger) — Disc-shaped rubber tip used to create pressure pulses through drain rods.
Drain rod tip (scraper) — Flat-bladed tip used to scrape deposits from pipe walls.
Drain root removal — Combined cutting and extraction of roots from a drain to clear obstructed flow.
Drain rooting — Process of cutting tree roots out of a drainage pipe to restore flow.
Drain run — Continuous length of drain pipe between two access points such as inspection chambers.
Drain scaling (limescale build-up) — Hard limescale deposits inside drain pipes, restricting flow in hard water areas.
Drain sediment build-up — Layer of silt, grit and organic residue accumulating in low or slow-moving drain sections.
Drain survey footage — Recorded video from a CCTV drain inspection, supporting the written survey report.
Drain tracer (sonde) — Electronic sonde inserted into a drain that emits a signal detected at ground surface.
Drain trap (gully trap) — External fitting with a built-in water seal where waste pipes discharge to the drain.
Drain unblocking — Removal of obstructions from a drain to restore normal flow through the pipework.

1 2 Następna »

Professional Drainage & Plumbing Services Across Greater London.

Need drainage help?

Słownik

Navigation

All Services

Articles