Commercial Drainage Exmouth | What Businesses Must Know

A blocked drain at home is an inconvenience. A blocked drain at your café, your HMO, or your commercial unit on The Strand can close you down, void your insurance, or land you with a legal notice. The drainage rules for businesses and landlords are meaningfully different from those for owner-occupiers, and the consequences of getting them wrong are proportionally worse.

This post covers the three areas where I see the most avoidable problems in commercial and rental properties around Exmouth: grease management, planned maintenance contracts, and landlord obligations under the tenancy framework.

Grease Traps: the Silent Killer of Commercial Kitchens

If you run any kind of food operation, from a small café near Exmouth Seafront to a hotel kitchen in Phear Park, you are generating fat, oil, and grease every single service. That FOG doesn't disappear when it goes down the plug. It cools, solidifies, and accumulates on the inside of your drainage pipework. Over time, it sets almost as hard as concrete and narrows the pipe bore until flow stops entirely.

The physics is straightforward. Hot fat leaves the pan as a liquid, mixes with wash water, and travels maybe two or three metres before the temperature drops enough for it to start sticking. That deposit is rarely in a convenient location. It's usually a metre underground, under a concrete floor, or inside a shared run serving three other units.

A grease trap intercepts that FOG before it reaches the sewer. Properly sized and regularly serviced, a trap is not glamorous but it's the single most effective piece of infrastructure a food business can install.

What goes wrong with grease traps

Most commercial grease trap failures I see through the CCTV camera fall into one of four categories:

• The trap was never sized correctly for the kitchen's output. A unit doing thirty covers a day and one doing two hundred a day cannot share the same trap specification.
• Servicing intervals were set optimistically and never reviewed. A busy kitchen can fill a trap much faster than the paperwork suggests.
• Kitchen staff pour boiling water or caustic cleaner through the trap, which temporarily liquefies the accumulated FOG and flushes it further down the drain, past the trap, straight into the sewer. South West Water does not find this charming.
• The trap was installed, serviced once, and then forgotten entirely when a new tenant took over.

South West Water can and does serve notice on businesses contributing to grease blockages in the shared sewer. The cost of clearing a fatberg is recoverable from the businesses identified as the source. That is not a hypothetical threat. It has happened to operators in Devon.

Grease trap servicing frequency

The rule of thumb is to inspect and pump the trap when it is 25% full of FOG. Waiting until it's overflowing means you've already had flow problems and potentially discharged grease downstream. For a busy Exmouth restaurant operating year-round, monthly servicing is not unusual. A seasonal café on the seafront might manage quarterly in winter, monthly through the summer season.

A planned maintenance contract takes that decision off your plate. You set the intervals based on actual throughput data, not guesswork, and you have a paper trail showing due diligence if South West Water ever comes asking.

Planned Drain Maintenance: Why Reactive Is the Expensive Option

The economics of drain maintenance are genuinely counterintuitive until you've seen the alternative a few times.

A reactive call-out to clear a blocked drain in a commercial premises costs more than a scheduled maintenance visit, takes longer to book in busy periods, carries the risk of operational downtime, and fixes only the presenting symptom. It tells you nothing about what else is building up, cracking, or collapsing elsewhere in your drainage system.

A planned maintenance contract, by contrast, gives you:

• Scheduled high-pressure water jetting at intervals matched to your usage profile
• CCTV inspection on a frequency that catches deterioration before it becomes failure
• A drainage log that satisfies your insurer, your environmental health officer, and your landlord if you're a commercial tenant
• Priority response times if something does go wrong between visits

For landlords managing multiple rental properties across Exmouth, whether that's a block of flats in Brixington, a row of terraced lets in Withycombe Raleigh, or commercial units in the town centre, a single contract covering all assets is almost always cheaper per property than individual reactive call-outs and far easier to administer.

What a CCTV survey adds to the picture

Jetting clears what's there. CCTV shows you what's coming. In older Exmouth stock, particularly Victorian and Edwardian terraces in areas like Halsdon and Marpool, the drainage infrastructure has had over a hundred years to develop problems. Cracked joints, displaced pipes, root ingress from boundary trees, partial collapses, and bellies (where a pipe has sagged and holds standing water) are all findings I've recorded on camera in properties that had no obvious symptoms at the surface.

A belly won't respond to jetting. A displaced joint will keep letting root ingress in regardless of how many times you clear the roots. CCTV gives you the actual diagnosis, which determines the actual fix.

For landlords, a pre-tenancy CCTV survey creates a baseline record. If a drain fails during a tenancy, you know whether the cause was pre-existing or something the tenant introduced. That distinction matters considerably when insurance claims or deposit disputes arise.

Landlord Obligations: What the Law Actually Requires

This is the part of drainage that landlords most frequently underestimate, and the part that generates the most uncomfortable conversations.

Residential landlords

Under the Landlord and Tenant Act 1985, and more recently the Homes (Fitness for Human Habitation) Act 2018, a landlord must keep a rental property fit for human habitation throughout the tenancy. Drainage is explicitly included. A drain that is blocked, collapsed, or causing sewage to back up into the property is a Category 1 hazard under the Housing Health and Safety Rating System. A local authority can serve an improvement notice, and a tenant can pursue a claim directly through the courts.

Practically, this means:

• You can't simply tell a tenant that the drain blockage is their fault and leave it at that, not without evidence.
• You're responsible for the structural condition of the drainage serving the property, even if the tenant's behaviour contributed to a blockage.
• Gas safety and electrical safety certificates are well understood by landlords. Drain condition is less formalised but the legal exposure is real.

A CCTV survey at the start and end of a tenancy is the clearest way to establish baseline condition and identify any tenant-caused deterioration. It also demonstrates that you are a landlord who takes the property's condition seriously, which tends to attract better tenants and smoother tenancies.

HMO landlords

HMOs carry additional scrutiny. An HMO licence issued by East Devon District Council can include conditions relating to drainage and waste management. The more occupants sharing a single drainage run, the faster grease, scale, and debris accumulate. Quarterly jetting is a reasonable minimum for most Exmouth HMOs. Annual CCTV inspection is worth the investment.

Commercial landlords and tenants: who pays for what

This depends almost entirely on the lease, which is why you should read yours before a drain fails at 8pm on a Friday.

In a full repairing and insuring (FRI) lease, the tenant typically carries responsibility for maintaining and repairing the drains serving their demise. In a shorter or more landlord-friendly lease, that obligation may sit with the landlord. In a multi-tenanted building with shared drainage, the lease structure often puts day-to-day maintenance on individual tenants but structural repair with the landlord.

The traps (no pun intended) appear when:

• A drain serves more than one unit and one tenant is contributing disproportionately to blockages
• A structural defect, a cracked pipe predating the tenancy, for example, is being confused with a maintenance failure
• A tenant vacates and leaves a drainage system in worse condition than they found it

In each case, a pre-tenancy CCTV survey and a clear maintenance log are the documents that resolve the dispute without expensive solicitors.

A Note on South West Water's Responsibility

South West Water owns and maintains the public sewers. The private lateral drain, from your property boundary to the public sewer connection, is your responsibility if you're the owner, or your landlord's if you're a tenant, depending on the lease. Getting this boundary wrong is a common and costly error. A CCTV survey can map the pipe run and confirm where the public sewer starts, which prevents you paying to clear a sewer that isn't yours, and equally, prevents you ignoring a drain that is.

The Seasonal Reality in Exmouth

Exmouth is a busy coastal town. The hospitality and retail sectors in the town centre and along the seafront have marked seasonal peaks. Summer drainage problems in a restaurant or café are about the worst time to discover that the grease trap is overdue or that there's a partial collapse sixty centimetres from the kitchen drain.

Getting a CCTV survey and a jet clean done in late winter, before the summer season, is the sensible order of operations. It gives you time to address findings rather than managing a crisis during your busiest trading period.

Businesses in the Sandy Bay area and landlords with seasonal lets similarly benefit from a spring inspection, before the property is handed to holiday tenants who are, statistically, more adventurous with what they consider flushable.

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Drainsco covers Exmouth and the surrounding EX postcodes, including Lympstone, Exton, Topsham, Budleigh Salterton and Sidmouth. Engineers are available 24 hours a day, seven days a week. There's no call-out fee, and you'll get a clear price before any work starts. Commercial drain maintenance contracts, CCTV surveys, grease trap servicing and emergency response are all part of what we do. If you're a landlord or business owner who wants to get the drainage sorted before it becomes a crisis, give us a ring.