When you turn on a tap or flush the toilet, you probably don’t think about what happens next. But behind every sink, bath, and drain is a complex network designed to remove waste safely and efficiently. When that network becomes blocked or damaged, the results can be unpleasant, from foul odours to full blown flooding.
Drain cleaning may not sound glamorous, but it’s a vital service that combines engineering, science, and environmental care. In this blog, we’ll explore what really goes on during a professional drain cleaning, why it’s essential for homes and businesses, and how United Drains uses modern technology to keep the city’s drains flowing smoothly.
Why Drain Cleaning Is So Important
The UK’s drainage infrastructure is constantly under pressure. Everyday activities, like washing dishes, showering, and flushing the toilet, send thousands of litres of wastewater through pipes each day. Over time, this water carries grease, food, hair, soap, and debris that can accumulate inside the system.
Without regular cleaning, this build-up restricts water flow and eventually causes blockages. According to Thames Water, fatbergs (massive congealed blockages made of grease, wipes, and debris) are responsible for 37,000 blockages every year in London alone.
Keeping drains clean isn’t just about convenience; it’s about public health, hygiene, and protecting the environment.
The Science Behind Drain Cleaning
Modern drain cleaning is far more advanced than simply using rods or plungers. Engineers use hydrodynamics, physics, and precision technology to remove blockages effectively without damaging the pipework.
1. High-Pressure Water Jetting
This is one of the most powerful and environmentally friendly methods. High-pressure water is blasted through the pipes at speeds exceeding 3,000 psi, breaking up grease, roots, and debris. It’s efficient, chemical-free, and suitable for everything from domestic drains to industrial pipelines.
United Drains’ drain unblocking services use water jetting systems that clean pipe interiors thoroughly, restoring full flow capacity.
2. Mechanical Cleaning
For stubborn obstructions such as concrete or hard debris, mechanical cutting heads are attached to flexible cables. These spin rapidly to scrape away build-up and open the pipe safely.
3. Biological Cleaning Solutions
In sensitive environments, engineers use eco-friendly enzymes that naturally break down organic waste. These solutions are safe for both the system and the environment, a sustainable alternative to harsh chemicals.
What Causes Most Blockages?
Understanding the cause of blockages helps prevent them. The most common culprits are:
• Fat, oil, and grease (FOG) – These substances solidify in pipes, forming sticky layers that trap debris.
• Wet wipes and sanitary products – Even those labelled “flushable” often don’t break down properly.
• Hair and soap scum – Common in bathroom drains, where they combine to form stubborn clumps.
• Tree roots – These naturally seek moisture and can penetrate old or cracked pipes.
• Structural issues – Collapsed or misaligned pipes restrict flow and require immediate attention.
If you notice slow drainage, gurgling sounds, or unpleasant smells, it’s time to call in professionals like United Drains before the issue escalates.
The Role of Technology in Modern Drain Cleaning
Advanced technology has transformed drainage maintenance. What once required excavation can now be diagnosed and fixed with minimal disruption.
CCTV Drain Surveys
Before cleaning begins, CCTV drain surveys help engineers see inside the pipes. A waterproof camera is inserted, streaming high-definition footage that identifies the exact cause and location of a blockage.
Jetting Units and Tankers
Commercial-grade jetting vehicles carry large water tanks and hose reels capable of reaching deep underground systems. These are especially useful for large properties, car parks, and commercial sites.
Real Time Reporting
Modern systems record inspection data and generate detailed reports, useful for landlords, surveyors, and property buyers who want full visibility of their drainage condition.
How Often Should Drains Be Cleaned?
The answer depends on the type of property and usage.
• Homes: Every 12-18 months is usually enough to prevent blockages.
• Restaurants & Catering Businesses: Every 3-6 months, due to grease and food waste build-up.
• Commercial Premises: At least twice a year for optimal performance.
Routine drain maintenance plans save money in the long term, helping avoid emergency call-outs and costly downtime.
Environmental Impact
Blocked or damaged drains don’t just affect buildings, they can also harm the environment. When wastewater overflows, it can contaminate soil and waterways, threatening wildlife.
That’s why the Environment Agency encourages responsible drain maintenance. By choosing eco-friendly cleaning methods, such as high-pressure water jetting or biological enzymes, we can keep systems clear while reducing chemical pollution.
DIY vs Professional Drain Cleaning
While home remedies like plungers or baking soda can help with minor slow drains, professional cleaning is essential for complete blockage removal. Attempting to use drain rods or chemical cleaners without experience can damage pipes or worsen the problem.
Professionals not only remove blockages but also identify underlying structural issues, offering long-term solutions rather than temporary fixes.
Why Choose United Drains?
United Drains combines technical expertise with exceptional customer service. Their engineers are fully trained, insured, and available 24/7 across London and the South East.
They offer:
• Advanced CCTV diagnostics
• High-pressure jetting and mechanical cleaning
• Preventive maintenance plans for homes and businesses
• Emergency callouts any time, day or night
With decades of combined experience, the team ensures every job is handled safely, efficiently, and with minimal disruption.
Behind every clean, free flowing drain is a mix of engineering skill, modern technology, and scientific precision. Regular drain cleaning protects your property, saves money, and helps the environment.
Whether you’re a homeowner or managing a commercial site, professional drain maintenance isn’t a luxury, it’s essential care for your infrastructure.
Discover more about professional drain cleaning services and book your next inspection with United Drains today.