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Published 30 April 2025
If you’ve noticed small, fuzzy, moth-like flies hovering around your sink or bathroom drains, you’re likely dealing with drain flies, also known as sink flies or sewer gnats.
These tiny insects thrive in damp, organic-rich environments, especially within residential and commercial drains. Left untreated, they reproduce rapidly, creating an ongoing nuisance in your kitchen, bathroom, or utility room.
At Drain Master UK, we provide specialist drain fly removal services exclusively in West London, helping homeowners, businesses, and landlords deal with infestations effectively and permanently.
Our comprehensive inspection, treatment, and prevention strategy ensures long-lasting results.
Drain flies (family Psychodidae) are typically 1.5–5 mm in size, with fuzzy wings and a tendency to rest near drains.
They lay eggs in the organic sludge that builds up inside neglected drainage systems. One fly can lay up to 100 eggs, making infestations swift and stubborn.
. Kitchen and bathroom sinks
. Bathtubs and shower drains
. Toilet overflows
. Washing machine outflows
. Basement or garage floor drains
These areas offer the perfect environment for moisture, warmth, and decomposing material, for their breeding cycle to thrive.
Though not directly dangerous, a drain fly infestation is a warning sign of poor hygiene within your drainage system.
. Persistent foul smells from sinks or shower drains
. Blocked or slow-moving wastewater
. Poor hygiene ratings for food businesses
. Bad impressions for visitors or customers
. Increased likelihood of other pests attracted to damp environments
More critically, store-bought solutions rarely reach deep enough into the drainage system to destroy larvae, pupae, and the organic residue they thrive in.
. Dark, fuzzy-winged insects near drains
. A musty smell or gurgling sounds from pipework
. Sticky residue or slime buildup around plug holes
. Sudden swarms appearing when water hasn’t run in a while
Try the overnight tape test: Place clear tape, sticky side down, over a suspected drain. If flies are present, you’ll find them stuck to the tape in the morning.
At Drain Master UK, we implement a 5-step professional system to remove drain flies at the source — not just on the surface.
We begin with a high-definition CCTV survey of your drainage system to identify:
. Hidden sludge or biofilm build-up
. Breeding hotspots
. Damaged pipes or pooling water
This helps us target precisely where the infestation starts.
Next, we clear the pipes using:
. High-pressure jetting systems
. Rotary mechanical cleaning tools
This step removes slime, grease, and food debris, along with any fly larvae embedded in the organic matter.
We follow up with biological drain cleaners, non-toxic enzymatic agents that break down remaining organic material without damaging your plumbing. Unlike bleach or harsh chemicals, these cleaners are safe, effective, and environmentally friendly.
To tackle adult drain flies, we deploy:
. Sticky traps and pheromone-based lures
. ULV fogging (in extreme cases) to flush out residual adult insects
We ensure that all lifecycle stages, egg, larva, pupa, adult are disrupted.
Once your drains are cleaned and cleared, we advise on:
. Routine cleaning schedules
. Preventive enzyme dosing
, Proper disposal of fats, oils, and grease (FOG)
, Ventilation and moisture control
We ensure that all lifecycle stages, egg, larva, pupa, adult are disrupted.
While professional cleaning is essential for full eradication, there are a few at-home steps you can take:
🔹 Pour boiling water down drains twice daily
🔹 Scrub drain covers and pipes with a stiff brush
🔹 Use a baking soda + vinegar solution to flush surface buildup
🔹 Dry unused drains with absorbent towels to prevent water stagnation
These can help reduce fly numbers while waiting for your Drain Master UK technician.
Drain Master UK proudly serves only the West London area, ensuring fast response times and local expertise.
Ealing
Acton
Chiswick
Hammersmith
Fulham
Shepherd’s Bush
Notting Hill
Kensington
Brentford
Hounslow
Richmond upon Thames
Whether you live in a flat, manage a restaurant, or own a large commercial property, we bring targeted drain fly control to your doorstep.
. Rapid response – same-day service available
. Local technicians who know the drainage layouts of West London properties
. Fully insured and qualified experts
. Advanced diagnostic tools
. Affordable and transparent pricing
. Eco-friendly practices
We’ve helped hundreds of West London clients reclaim their kitchens, bathrooms, and business premises from these persistent pests.
Don't wait for a few flies to become a full-blown infestation. Drain flies are a sign of deeper problems in your drainage system, and only a comprehensive cleaning approach will solve it permanently.
Contact Drain Master UK today to book your inspection, request a free quote, or speak directly with one of our West London specialists.
At Drain Master UK, we provide a complete range of professional drainage services for both residential and commercial customers across Twickenham, Kingston, Surbiton, Richmond, Barnes and the wider South West London area. From emergency call-outs to long-term maintenance, our experienced engineers deliver fast, reliable and cost-effective solutions tailored to your needs. Explore our services below to see how we can keep your drains clear, safe and working at their best.

Drainage problems can strike suddenly. Our emergency team is available 24 hours a day, 7 days a week, providing fast and dependable drainage services for homes and businesses across Twickenham, Kingston, Surbiton, Richmond and nearby areas.
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Leaking drains, blocked sinks and overflowing toilets can cause disruption and costly damage. Our domestic drainage engineers support homeowners, tenants and landlords across Twickenham, Kingston, Surbiton, Richmond and Barnes, with 24/7 call-outs to keep your home safe and functional.
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Blocked pipes or flooding can grind a business to a halt. We provide round-the-clock commercial drainage support for restaurants, offices, shops, warehouses and industrial premises across Twickenham, Kingston, Surbiton, Richmond and Barnes, minimising downtime and protecting your reputation.
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Slow water flow or unpleasant smells usually mean a blockage. Our cleaning and unblocking services deliver fast, long-lasting results for residential and commercial drains in Twickenham, Kingston, Surbiton, Richmond and surrounding areas, available day or night when you need us most.
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Clogged sinks and toilets are common but disruptive. Whether it’s a slow drain or a complete blockage, our engineers provide quick, reliable solutions for homes and businesses across Twickenham, Kingston, Surbiton, Richmond and nearby areas, available 24/7 for emergencies.
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Hard water causes limescale buildup, narrowing pipes and leading to blockages or damage. Our professional descaling service removes deposits safely and effectively, keeping drains clear for homes and businesses across Twickenham, Kingston, Surbiton, Richmond and South West London.
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Tree roots often invade underground pipes, causing cracks, leaks and blockages. Our root removal service provides safe and lasting solutions for residential and commercial drains across Twickenham, Kingston, Surbiton, Richmond and beyond, restoring full flow quickly.
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Persistent drain smells can point to hidden problems like trapped debris, cracks or stagnant water. Our engineers investigate and eliminate odours across Twickenham, Kingston, Surbiton and Richmond, restoring comfort and preventing further damage or infestations.
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Cracked or collapsed drains cause recurring issues if ignored. Our repair and replacement service provides durable solutions for homes, businesses and industrial properties across Twickenham, Kingston, Surbiton, Richmond and South West London.
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When patch repairs aren’t enough, a full drain rebuild is the long-term solution. Our team specialises in safe, professional reconstruction, restoring full function and protecting properties from repeat failures.
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Our no-dig drain relining and trenchless repair methods strengthen and restore damaged drains without excavation. Serving Twickenham, Kingston, Surbiton, Richmond and South West London, this modern approach is cost-effective, durable and efficient.
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For severely damaged systems, excavation may be required. Our engineers handle all aspects of groundworks safely and efficiently, replacing broken pipes with durable new systems across Twickenham, Kingston, Surbiton, Richmond and wider South West London.
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Our no-dig pipe relining service repairs damage from inside the pipe, avoiding costly excavation. Covering Twickenham, Kingston, Surbiton, Richmond and South West London, this method is affordable, reliable and long-lasting.
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We provide safe and fully compliant manhole repair and replacement services across Twickenham, Kingston, Surbiton, Richmond and South West London, from simple cover changes to complete chamber rebuilds.
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Using advanced CCTV, sonde tracing and ground-penetrating radar, we provide detailed drain mapping for homes and commercial sites in Twickenham, Kingston, Surbiton, Richmond and South West London.
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Poor surface water drainage can lead to flooding, damp and foundation damage. Our engineers design and install effective stormwater systems across Twickenham, Kingston, Surbiton, Richmond and nearby areas, protecting your property from water damage year-round.
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Our high-pressure jetting equipment removes stubborn dirt and buildup without harsh chemicals. Serving Twickenham, Kingston, Surbiton, Richmond and South West London, we restore surfaces quickly and safely.
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Our CCTV drain surveys use the latest camera technology to diagnose problems without unnecessary digging. Available 24/7 across Twickenham, Kingston, Surbiton, Richmond and South West London, we provide clear reports for both residential and commercial clients.
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We use non-invasive methods like acoustic listening, tracer gas and thermal imaging to detect hidden leaks with precision. Covering Twickenham, Kingston, Surbiton, Richmond and South West London, our engineers provide accurate diagnostics 24/7.
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We install and maintain grease traps, clean interceptors, empty septic tanks and service sewage treatment plants. Our solutions keep homes and businesses compliant with UK water regulations while ensuring wastewater systems run efficiently and safely.
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We provide professional grease trap installation and ongoing servicing across Twickenham, Kingston, Surbiton, Richmond and South West London — helping commercial kitchens and food businesses remain compliant and efficient.
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From rural properties to large commercial sites, we install, empty and service septic tanks and sewage treatment plants, ensuring safe, efficient wastewater management across Twickenham, Kingston, Surbiton, Richmond and South West London.
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Our tailored maintenance plans prevent costly emergencies, keeping drains clear and compliant all year round. Ideal for homeowners and businesses across Twickenham, Kingston, Surbiton, Richmond and surrounding areas.
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Rodents often access properties through drainage systems. Using surveys, non-return valves and proofing methods, we provide long-term protection against infestations for homes and businesses across Twickenham, Kingston, Surbiton and Richmond.
LEARN MOREWe will treat your call with urgency and provide same-day emergency pest control services anywhere in or
around West London, South West London, Twickenham, Kingston and Richmond. On Time Pest Controllers work to the strictest of
British Industry Standards and guarantee humane pest control methods for all levels of infestation.
We know all there is to know about how to get rid pests, from birds to bees and always
include professional cleaning services for contaminated areas and areas which present a risk to human health.
Get in touch with our team for expert 24 hour pest control guidance!


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Comprehensive coverage across Twickenham and surrounding regions
We proudly serve Twickenham and surrounding regions, including Kingston, Surbiton, Richmond, Barnes, Teddington, Ealing, Chiswick, Hampton, Staines, and more.
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Phone: 0208 893 9505 or Mobile: 07956 110288