A CCTV drain survey uses a waterproof camera to film the inside of a whole run of drain, then produces a report marking the location and depth of each problem — unlike the on-the-spot "find the blockage" detection, it's a formal inspection, usually done by owners' corporations, before a property handover, or before site works.
How Is a CCTV Drain Survey Different from Pipe Detection?
Both use the same waterproof camera; the difference is scope and purpose. "Detection" is usually when a drain is blocked and you want to locate the blockage — filming a short section is enough. A "survey" takes stock of a whole run of drain: filming it end to end, marking the location and depth of each problem, and producing a report you can file and discuss at a meeting. So for cases that need "a record you can account for" — a property handover, an owners' corporation's annual check, or before site works — what's done is a survey, not just a quick clearing. To understand how the service works, see "What Is a CCTV Pipe Survey".
When Do You Need a CCTV Drain Survey?
- Routine inspection of a building's shared drains: an owners' corporation or management office that wants a clear picture of the shared pipes and a basis for prioritising repairs is better off with a survey report than waiting for a burst to patch up.
- Due diligence before a handover or buying a village house: underground drains can't be seen, so film them clearly before the handover — know whether there are cracks, leaks, root intrusion or displaced pipes before you sign.
- Tracing the cause of repeat blockages: if the same spot blocks year after year, it's likely structural rather than just dirt; one survey shows whether it's ageing, bad falls or a break.
- Confirming drain routing before site works: knowing where the underground pipes run before you start avoids digging through an existing drain and the compensation and rework that follow.
How Do You Arrange a CCTV Drain Survey?
The clearer you are when you enquire, the more accurate the quote and scheduling. Before booking, spell out:
- Which sections to film: a single unit, a street drain, or the shared drains of a whole building.
- Where the manhole is and whether it opens: if a cover is sealed and must be opened, or you don't know where it is, say so up front so the company can assess whether that part is needed.
- Whether the line is clear enough for the camera: if it's blocked solid and the camera can't be pushed through, a basic clearing has to happen first, and that part is generally charged separately.
- Whether you need a written report, and who it's for: an owners' corporation, a management office, a solicitor, or the other side of a transaction — this decides whether you need footage and a formal report marking location and depth.
Spell these out and a legitimate company can quote a firm figure, confirmed before the work starts, with no on-site add-ons. To understand how it's priced, see "How Much Does a CCTV Pipe Survey Cost".
What Does a CCTV Drain Survey Report Contain?
A thorough survey report generally includes footage of the inside of the pipe, the location and approximate depth of each problem (blockage, crack, leak, roots, displacement and so on), and suggested follow-up. The value isn't just that it was "filmed" — it's that owners, an owners' corporation or a management office get an objective basis to take into a meeting, set a budget, and get repair quotes from contractors, rather than relying on word of mouth. So before booking, ask clearly whether footage and a written report can be provided, or whether it's on-screen viewing only.
How to Choose a CCTV Drain Survey Without Getting Ripped Off
- Verify the DSD registration number: a legitimate drainage company can be found on the Drainage Services Department's public list — ask for the number before booking and check it yourself.
- A quote they can explain: a company willing to say the charge is based on drain length, access, opening manholes and reporting is better than one that quotes a "fixed price" with no explanation.
- They can actually produce the report and footage: if it's for a transaction or an owners' corporation meeting, ask up front whether there's a formal report — don't find out afterwards that it was verbal only.
- Don't just chase the cheapest: a low quote followed by add-ons on the day (opening a manhole, clearing the line, extra sections) is exactly the trap.
To arrange a survey in one visit, or combine it with drain clearing or septic pumping, describe your site on our "CCTV drain survey" page, or just WhatsApp us.
FAQ
Q: Are a CCTV drain survey and pipe detection the same thing? The camera is the same, but the scope and purpose differ. Detection usually films a short section to find a blockage; a survey films a whole run of drain and comes with a report — suited to a handover, an owners' corporation's annual check, or before site works.
Q: Is a survey worth doing if nothing is blocked? Yes. A handover, buying a village house, or a building's routine inspection is exactly when you want to see the underground drains clearly before trouble starts — catching cracks, leaks or ageing early beats waiting for a burst or a leak downstairs to patch up.
Q: Does a survey always come with a written report? Footage and a written report marking the location and depth of each problem can be provided, but whether you need one depends on the purpose. Say at the enquiry stage whether it's for an owners' corporation, a management office or a transaction, and the company will quote with the report included.
Motion Waste Management Limited (DSD registration number P0038) has served Hong Kong since 1992, providing CCTV drain surveys and pipe detection alongside septic tank, grease trap, drain clearing and sludge/slurry removal — so we can attend in a single visit, survey first and then carry out the work, cutting the time and cost of repeat visits. Our registration number can be verified on the DSD's public list. When you enquire, we first understand the site — which sections to film, where the manhole is, and access — before providing a transparent quote, with no on-site price hikes. To arrange a survey or ask for a quote, describe your site via WhatsApp or the quotation form; details are on our "CCTV drain survey" page.