Ask a commercial property manager to name their biggest maintenance blind spots, and drains, water backflow devices, and gutters rarely make the top of the list. Fire systems, lifts, and air conditioning get the attention because they’re visible and their servicing schedules are usually mandated by lease terms or insurance. Drainage, backflow, and roof drainage tend to get attention only once they’ve already failed.
That’s a costly habit, because all three are cheap to inspect and expensive to repair once neglected — and on most commercial sites, they’re more interconnected than they look. A blocked gutter overflowing into a wall cavity, a drain line nobody’s checked in a decade, and a backflow device installed without documentation are three separate risks that share one root cause: nobody owns them on the maintenance calendar. Here’s how to think about all three properly.
Starting underground: what a CCTV drain inspection actually reveals
Commercial drainage networks are built to last decades, but “built to last” doesn’t mean “maintenance-free.” Tree root ingress, ground movement, pipe corrosion, and simple age all take a toll on underground pipework that’s completely invisible from the surface — until a blockage, a bad smell, or a wet patch in a car park signals that something’s already gone wrong.
A CCTV drain inspection solves the visibility problem directly. A waterproof camera is fed through the pipe network, recording exactly what condition the pipe walls, joints, and connections are in. For a facility manager, that footage does two things at once: it identifies problems before they become emergencies, and it creates a documented record of drain conditions that can inform capital works planning years in advance.
This matters more on older commercial buildings than newer ones. Many sites built before the 2000s have drainage plans that are incomplete, outdated, or simply don’t exist anymore — meaning a CCTV survey is often the only accurate record of what’s actually running beneath the property. Once that baseline exists, a facility manager can schedule repairs on a five- or ten-year rolling program instead of reacting to whichever section fails first.
Reading the footage: what actually needs action
Not every finding from a CCTV inspection warrants immediate work. Minor root hair intrusion, cosmetic scaling, or slight joint displacement are common in older pipework and can usually be monitored rather than repaired immediately. What does need prompt attention is significant root intrusion restricting flow, cracking or fracturing of the pipe wall, or any section showing active collapse. A good inspection report separates these categories clearly, so a property manager isn’t left guessing which findings are urgent and which can sit on next year’s list.
Backflow prevention: the compliance obligation hiding in the riser
While drains carry water and waste away from a property, backflow prevention devices exist to stop contaminated water travelling the other direction — back into the drinking water supply. It’s a genuine public health risk, which is why Western Australian water authorities classify properties by hazard level and require registered, annually tested backflow devices on anything above a minimal-risk connection.
Backflow prevention compliance becomes especially relevant on sites with fire sprinkler systems, cooling towers, irrigation connections, or any commercial kitchen — all of which create the kind of cross-connection that backflow regulations specifically target. The practical challenge for a lot of property managers isn’t understanding the requirement; it’s tracking it. Backflow devices are often installed by whichever contractor did the original fit-out, with no ongoing testing schedule handed over to the building’s ongoing facilities team.
An annual testing regime closes that gap. It also catches device drift — a backflow preventer that passed its original commissioning test can degrade over 12 months as seals wear and debris accumulates, which is exactly why annual re-testing (rather than a one-off installation check) is the regulatory standard. Building this into the same maintenance visit as a general plumbing health check means one contractor call-out covers a compliance obligation that would otherwise be easy to lose track of.
Gutters: the maintenance item that only gets noticed when it’s raining
If drains and backflow devices are invisible because they’re underground, gutters are invisible because nobody looks up. On a commercial building, that’s a mistake with a predictable failure pattern: leaves, debris, and dust build up over months, water starts overflowing during the next heavy rain event, and it finds its way into a wall cavity, a ceiling void, or — worse — an electrical riser.
Commercial gutter cleaning on a scheduled basis (typically twice yearly for most Perth commercial sites, more often on properties near trees) avoids this entirely. It’s genuinely one of the cheapest preventative maintenance line items on a facility manager’s budget, and it protects against some of the more expensive water damage repairs a building can suffer — timber rot, mould remediation, and in bad cases, structural repair to a parapet or fascia that’s been sitting wet for months without anyone noticing.
The seasonal timing matters. Scheduling gutter cleaning ahead of Perth’s wetter months, rather than after the first heavy downpour has already caused an overflow, is the difference between a routine maintenance task and an emergency call-out with water damage attached.
Budgeting for all three without inflating the maintenance spend
A common assumption is that combining drain inspections, backflow testing, and gutter maintenance into a coordinated schedule must cost more than handling them separately, purely because it sounds like a bigger program. In practice, the opposite tends to be true. A single contractor visit that covers a partial CCTV survey, a backflow test, and a gutter clean is almost always cheaper than three separate call-outs across the year, simply because mobilisation and site access — the fixed costs behind any trade visit — only get charged once.
The bigger saving, though, isn’t in the maintenance visit itself; it’s in what gets avoided. A gutter overflow that’s left unaddressed for two years might cost a few hundred dollars to clean properly at the outset, or several thousand dollars in timber rot and internal water damage repair if it’s left until the ceiling shows a stain. The same logic applies to backflow devices left untested past their compliance window, and drain sections left unsurveyed until a blockage forces an emergency dig-up. None of these are close calls financially — proactive maintenance is cheaper every time, and usually by a wide margin.
For a facility manager building next year’s budget, framing these three items as a single coordinated line — rather than three separate discretionary spends that are easy to defer individually — makes the case for the whole program much easier to justify to ownership, and much harder to quietly drop when budgets tighten.
Why these three belong on the same schedule
Treated separately, drains, backflow devices, and gutters are three different trades, three different call-outs, and three different lines in a maintenance budget that’s easy to under-prioritise individually. Treated together, they’re a single annual (or bi-annual) site visit that covers underground drainage condition, water supply compliance, and roof drainage health in one pass.
This isn’t just about convenience. A property or facility manager who can point to a documented history of drain inspections, backflow test certificates, and gutter maintenance records is in a fundamentally stronger position when it comes to insurance claims, lease negotiations, or ownership reporting than one who’s relying on “we haven’t had a problem yet.” The first is asset management. The second is luck, and luck runs out eventually — usually during the wettest week of the year, at the worst possible time for a claim to be contested.
Putting it into practice
For a facility manager building or refreshing a maintenance schedule, the practical steps are straightforward: confirm the property’s backflow hazard classification and testing due date, book a CCTV drain survey if one hasn’t been done in the last five years (or ever), and set gutter cleaning to occur before the wetter months each year rather than after the first overflow. None of these are large jobs individually. Together, they close off three of the quietest and most expensive risks a commercial property carries.
The properties that manage this well aren’t necessarily spending more on maintenance — they’re just spending it on a schedule, rather than in response to whichever system fails first.