Commercial Drainage Basingstoke | What Businesses Must Know

If you own a commercial property, run a food business, or let residential units in the RG postcodes, drainage isn't something you can leave to chance and fix when it goes wrong. There are legal obligations, lease clauses, and practical realities that catch people out. Here's a plain account of what applies to you.

Grease Traps: The Issue Most Basingstoke Catering Businesses Ignore

Any food business that puts cooked food, cooking oil, or washing-up water down a drain should have a grease trap fitted and maintained. That covers cafés on London Street, takeaways in Chineham, restaurant units at Festival Place, and the commercial kitchens in industrial units across Viables and Houndmills.

A grease trap intercepts fats, oils, and grease before they hit the public sewer. Without one, or with one that hasn't been cleaned in months, you're building a blockage one meal service at a time. The grease congeals in the pipework, catches food particles, and eventually you've got a drain that won't move at all, usually on a Friday evening.

Under the Water Industry Act 1991, a business that causes a blockage in the public sewer can be held liable for the cost of clearing it. Thames Water and South East Water can and do pursue this. Getting your trap pumped out every three to six months is cheaper than the alternative.

What does maintenance look like in practice?

• The trap is emptied and the interceptor basket cleaned
• Pipework downstream is jetter-cleared with high-pressure water jetting
• A CCTV drain survey every year or two confirms nothing has crept past the trap

We carry out all of this for commercial clients across Basingstoke and the surrounding RG21 to RG29 area. If you're not sure whether your current setup meets the requirement, that's worth a conversation before an environmental health inspection makes it urgent.

Planned Maintenance: Why 'Fix It When It Breaks' Costs More

Emergency call-outs are more expensive than planned visits. Not just in money, either. A blocked drain in a busy commercial unit means lost trading time, potential health and safety issues, and in some cases a temporary closure. None of that is good.

A commercial drainage maintenance contract flips the model. You agree a schedule of preventative visits, typically every three, six, or twelve months depending on the type of business, and the drains get jetted, inspected, and signed off before anything becomes a problem.

For a warehouse or light industrial unit in Hatch Warren or the Viables estate, annual jetting plus a CCTV survey is usually enough. For a kitchen, café, or food prep facility, quarterly is more realistic. A pub or hotel with high water usage should be looking at a programme that covers both internal stack pipes and the external drainage runs.

The other advantage of a contract is documentation. If you're ever in dispute with a tenant over who caused a blockage, or with a utilities company over a shared sewer, having a service history shows you've done your part.

Landlord Obligations: What the Law Actually Says

This is where a lot of residential and commercial landlords in Basingstoke get caught out, because the rules aren't always obvious.

Residential landlords (whether you've got one flat above a shop in Old Basing, or a portfolio of houses in Brighton Hill and Popley) are required under the Landlord and Tenant Act 1985 to keep the structure and exterior of the property in repair. Drainage that runs beneath, through, or around the building falls under that. If a shared soil stack blocks and causes a leak, that's on you, not your tenant, unless the tenant demonstrably caused it (flushing wipes, putting cooking oil down the sink, and so on).

Private drains serving one property are the property owner's responsibility up to the point where they connect to a public sewer. Shared drains serving more than one property were transferred to Thames Water in 2011, under the Water Industry (Schemes for Adoption of Private Sewers) Regulations. So if you have two or more properties sharing a drain run, Thames Water should now own and maintain the shared section. Worth checking before you commission expensive excavation work on what turns out to be their asset.

Commercial landlords have additional considerations:

• Most commercial leases assign responsibility for internal drainage to the tenant and external drainage (including shared runs) to the landlord. Read the lease carefully. Vague wording gets expensive.
• A CCTV drain survey at the start and end of a tenancy gives you a condition record. That saves arguments at dilapidations.
• If your commercial tenant operates a kitchen and they haven't maintained a grease trap, the resulting blockage in the shared drainage can still land on your asset and your insurance claim.

The sensible move for any commercial landlord is a drain survey before a new tenant moves in and a drainage clause in the lease that makes maintenance obligations explicit.

CCTV Surveys: The Thing Worth Spending Money On

A lot of drainage problems, root ingress, cracked pipes, misaligned joints, grease build-up, aren't visible from the surface. You won't know they're there until there's a collapse or a slow-motion recurring blockage that won't clear with jetting alone.

A CCTV drain survey sends a camera through the pipe and gives you a recording plus a written report. For a commercial property in Basingstoke, this is worth doing:

• Before you buy or lease a commercial unit
• Before you let to a new tenant, so you have a baseline
• After any drain repair, to confirm the repair is solid
• If you're getting recurring blockages that jetting keeps clearing but not curing

For remedial work we identify and carry out, such as drain relining, pipe replacement, or structural repairs, Drainsco backs the work with a 20-year guarantee. That kind of assurance means something when you're a landlord with a long-term asset to protect.

Root Cutting and Gully Clearance

Two things that come up often on older Basingstoke commercial and residential sites: tree roots and blocked gullies.

Roots from mature trees find their way into clay drainage systems through joints and cracks. Once inside, they grow fast and block flow almost completely. We cut and remove them with specialist root-cutting equipment, and then a CCTV survey shows whether the pipe needs relining or replacing to stop roots returning.

Gullies, the surface water drains in car parks, service yards, and around commercial buildings, fill up with silt, leaves, and debris. They need regular clearance. A blocked gully in a car park or loading bay can cause flooding that damages stock, creates liability if someone slips, and sends surface water into foul drains where it doesn't belong.

If your commercial premises has a car park or a yard with surface water drainage, gully clearance should be part of your maintenance schedule, not an afterthought.

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Drainsco covers Basingstoke and the full RG21 to RG29 area, with engineers available 24 hours a day for emergencies and planned commercial visits booked at a time that suits your business. There's no call-out fee, and you'll get a clear price before any work starts. If you're a landlord or business owner who wants to talk through a maintenance programme or book a CCTV survey, give us a call.