Drain Dictionary

Inspection & Technology

CCTV cameras, locators and the technology used to see inside pipes.

CCTV Drain Inspection A camera survey of the inside of a drain using a waterproof CCTV camera pushed or driven through the pipe, recording its condition and locating defects precisel Crawler Camera A remote-controlled, wheeled or tracked CCTV unit that drives through larger pipes, providing steerable, self-levelling footage of mains and long runs. Drain Report The written deliverable of a CCTV inspection: footage, defect log with chainages, severity gradings and repair recommendations — evidence you can act on. Dye Testing Adding fluorescent tracing dye to water at one point and watching where it appears, proving which pipe connects to what — simple, visual and conclusive. Pipe Locating The process of tracing where underground pipes and services run, using sondes, electromagnetic locators and existing plans, before any digging starts. Pre-Purchase Drain Inspection A CCTV survey of a property's drains before buying — checking the one major system a building and pest inspection cannot see. Push Rod Camera A drain camera mounted on a semi-rigid rod that the operator physically pushes through the pipe — ideal for house drains from 40 mm up to around 150 mm. Smoke Testing Blowing non-toxic smoke through a drainage system to reveal leaks, illegal connections and lost trap seals — wherever smoke escapes, air and odour can too. Sonde A small transmitter fitted to a drain camera or plumbing tool that broadcasts a signal through the ground, letting an operator on the surface pinpoint its exact

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Pipes & Materials (4) Drainage Structures (8) Blockages & Causes (14) Repair Methods (6) Cleaning & Clearing (3) Plumbing Fixtures (3) Sewer Systems (8) Stormwater (8) Trade Terminology (5) Regulations & Standards (5) Water Flow & Hydraulics (5) Tree Roots & Vegetation (2) Maintenance & Prevention (1)

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