Commercial Drainage Tewkesbury | Your Legal Obligations

A blocked drain at home is an inconvenience. A blocked drain at your café on the High Street at 7am on a Saturday, or in a rented terrace in Priors Park the morning your tenant calls the council, is something else entirely. The cost isn't just the drain clear. It's lost trading hours, a potential environmental breach notice, an angry tenant, and a landlord who's on the back foot with the local authority.

This post is for Tewkesbury businesses, commercial landlords, and residential landlords who own rental stock in the GL20 area. I'm going to cover grease trap obligations, what planned maintenance actually looks like in practice, and what your legal position is as a landlord when a drain fails. None of it is complicated, but a lot of people get caught out by it.

Why Commercial Drains Fail Faster Than Domestic Ones

A domestic drain handles washing-up water, shower waste, toilet flushing. A commercial kitchen, a pub, a takeaway on Barton Street, or a food unit on any of the Tewkesbury retail parks handles something much heavier. Fats, oils, and grease come off every plate, every pan, every fryer. Hot water carries them in liquid form, but the moment that water cools inside the pipe, the grease solidifies on the pipe wall. Layer by layer, the bore narrows.

This isn't a slow drip of a problem. A busy kitchen can coat 50 metres of drain in a matter of weeks. And unlike a domestic blockage where you notice a slow gurgle and have a few days to sort it, a commercial grease blockage tends to announce itself catastrophically. Drain backs up into the kitchen. Environmental Health notices the smell. A grease trap overflows into a surface water drain. None of those outcomes are cheap.

The businesses most at risk in Tewkesbury are:

• Restaurants, cafés, and takeaways (High Street, Barton Street, the Tewkesbury retail area)
• Pub kitchens, especially older premises with cast iron drainage that's been in the ground since before anyone thought about grease management
• Care homes and residential settings with commercial-scale catering
• Commercial units in places like Ashchurch that are set up as food production or processing
• Supermarket and food retail back-of-house drainage

Grease Traps: What They Are and Whether You Need One

A grease trap (sometimes called a grease interceptor) is a device fitted to the drainage line between a commercial kitchen and the main sewer. Its job is to slow the flow of wastewater, let the grease float to the surface, and trap it before it enters the pipework. The clean water continues to drain. The grease stays in the trap and gets pumped out periodically.

Do you legally need one? The short answer depends on your connection. If your premises drain into the public sewer, Severn Trent Water (who manage the sewers in Tewkesbury) can require you to fit a grease trap as a condition of your trade effluent consent. Trade effluent consent is the permission you need to discharge commercial wastewater into the public sewer. Most food businesses need one, and most food businesses know this. What fewer people know is that Severn Trent can inspect, and if they find evidence of grease entering their system without adequate interception, they can issue a notice requiring you to install a trap at your own cost within a set timeframe. Getting ahead of that conversation is much cheaper than responding to a notice.

For premises discharging to a private sewer or septic system, which you'll find more often in the villages around Tewkesbury, Twyning, Bredon, Deerhurst, Beckford, the same physical principle applies. Grease will wreck a septic tank's drainage field and the repair cost for that kind of damage is significant.

What Size Trap?

Trap sizing is based on kitchen throughput and the type of cooking. A small café doing light food will need a much smaller unit than a pub kitchen running 200 covers on a Friday night. Get this wrong and you end up with a trap that fills too quickly and overflows, or a trap so large it sits stagnant and causes odour problems. We can survey your setup and advise, but if you're buying a trap off the shelf without a site assessment, you're guessing.

Maintenance Frequency

A grease trap that isn't emptied regularly stops working. The grease layer builds until it starts escaping over the baffle and back into the drain. Typically, a busy commercial kitchen needs its trap pumped every four to six weeks. A quieter operation might stretch to three months. We'll tell you after the first service what we're seeing in terms of accumulation rate and adjust the schedule accordingly.

Planned Maintenance Contracts: Not a Sales Pitch, an Argument

I know how this sounds. Of course the drainage company is going to tell you to sign up for a maintenance contract. Bear with me, because I want to make the actual argument rather than just assert it.

Here's what happens without planned maintenance. You don't think about your drains. They start to restrict slowly. You notice a slight smell in the yard, a drain that's a bit slow, but it clears overnight so you assume it's fine. One busy Saturday it doesn't clear. You call for an emergency drain unblock at the weekend. The engineer comes out, jets the line, and finds the drain isn't just blocked, it's got a root intrusion that's been growing for two years, or a crack at a joint that's been letting silt in since before you took the tenancy. What should have been a scheduled jet and a CCTV survey is now an emergency call-out, potentially a repair or relining job, and a trading interruption you didn't plan for.

Planned maintenance for a commercial premise typically includes:

• Scheduled high-pressure water jetting of the main drainage runs, usually two to four times a year depending on the type of business
• Annual CCTV drain survey to catch structural issues early, before they become failures
• Grease trap emptying and service on the agreed schedule
• Root cutting and descaling where older clay pipes are involved
• Gully and manhole clearance to prevent surface flooding in yards and car parks
• A written record of every visit, which matters for due diligence, insurance, and if you ever have an Environmental Health visit

That last point is worth dwelling on. If Environmental Health attend your premises following a complaint or inspection and ask whether you have a drainage maintenance regime in place, a folder of service records from a registered contractor is worth considerably more than a verbal assurance that you get it sorted when it needs it.

For commercial landlords with multiple units, a single contract covering all properties is also much simpler to manage than chasing individual reactive calls.

Landlord Obligations for Residential Rentals in Tewkesbury

This section is for landlords with residential rental properties. Whether you own a couple of houses in Northway, a terrace in Mitton, a block of flats in Wheatpieces, or a portfolio spread across Walton Cardiff, Bishop's Cleeve, and Winchcombe, your obligations around drainage are the same.

Under the Landlord and Tenant Act 1985, Section 11, you're responsible for keeping the structure and exterior of the property in repair. Drains, gutters, and external pipes sit squarely within that. If a drain fails because of a structural defect, root damage, or a collapsed pipe, that's your problem to fix, not your tenant's. The tenant's obligation is not to cause misuse. Putting wet wipes, cooking fat, or foreign objects down the drain is on them. A drain that collapses because it's forty-year-old clay pipe in Tewkesbury's clay soil with roots from a mature tree pushing through the joints is on you.

Where it gets disputed is the middle ground. A partial blockage that's partly lifestyle (too much kitchen fat going down) and partly structural (a partially deformed pipe that's holding debris). In those cases, a CCTV drain survey after the blockage is cleared is your best friend. It shows you what the drain actually looks like and lets you separate what's structural from what's behavioural. If it's structural, you fix it and you have a record. If it's entirely debris from misuse, you have evidence for a conversation with the tenant about what they're putting down the drain.

For Houses in Multiple Occupation (HMOs), which there are a fair few of in the Tewkesbury area, the licensing conditions typically include keeping all drainage functional and properly maintained. A blockage that backs up and causes a hygiene issue in a shared kitchen or bathroom can trigger council involvement quickly. Don't let it get there.

Pre-Tenancy Surveys

I'd recommend a CCTV drain survey before every new tenancy, particularly in older properties. Not because tenants wreck drains, but because you want a baseline. If there's a pre-existing crack or root intrusion, you find it now and decide whether to repair it before anyone moves in. If a drain issue arises mid-tenancy, you have a survey showing the condition at the start of the let. That protects you.

What Drain Lining Means for Commercial and Rental Properties

When a CCTV survey finds structural damage, whether that's a crack, a displaced joint, root intrusion, or a section of collapsed pipe, the traditional response was to dig. Break up the driveway, the car park, the kitchen floor, the garden path, pull out the pipe, replace it, reinstate the surface. Time-consuming, disruptive, and expensive.

No-dig relining, which is what I specialise in, installs a resin-saturated liner inside the existing pipe. The liner cures hard, forming a new pipe within the old one, fully bonded to the host pipe wall. No excavation. For a business, that means no trading closure for groundworks. For a landlord, no tearing up a garden or a driveway and reinstating it. The repair is covered by a 20-year guarantee on the remedial work.

Not every job suits relining. If the pipe has completely collapsed over a significant length, or the profile is too distorted to allow the liner to conform properly, excavation may be the only option. But a lot of jobs that get defaulted to digging don't need it. It's worth asking.

Getting a Survey Before You Have a Problem

The biggest shift in thinking I'd encourage for any Tewkesbury business owner or landlord is this: stop waiting for the drain to tell you it has a problem. By the time it's backing up or causing a smell, whatever is wrong has usually been developing for months or years.

A CCTV drain survey gives you a current picture of every metre of drain under your property or premises. You know what you've got, you know what's marginal, and you can plan. For a commercial property, that planning feeds into your maintenance schedule. For a rental, it informs whether you repair before the next tenancy or monitor it.

Drainsco covers Tewkesbury and the surrounding GL postcodes, with engineers available 24 hours a day for emergency work. We also run commercial contracts and planned maintenance programmes for businesses, HMOs, and landlords with multiple properties. There's no call-out fee, and we'll give you a clear price before any work starts. If you want to talk through what your site or portfolio needs, call us.