Master Plumber Reveals: This £25 Dutch Trick Could Save You the £250 Emergency Call-Out — For Good

It was the smell that first made Dave Thompson suspicious. Sweetish, musty, faintly sewage-like — even though the bathroom in a Victorian terrace in Manchester looked spotless. The tiles gleamed, the toilet had just been cleaned, a fresh rim block was clipped to the bowl.

Thompson pulls on his gloves and saws out a section of the drain pipe. It is lying on the workbench now: about twenty centimetres of pipe, its inside coated with a centimetre-thick, crusty layer of scale. Rock-hard. Layer upon layer. Like the inside of an old kettle.

“This one,” says Thompson, holding it up to the camera, “came out of a completely normal family toilet. Four people. Three-bedroom home. And this is exactly what it looks like in most households — people just never see it.”

Dave Thompson is a master plumber in Manchester, running a third-generation family business. 28 years on the job. More than 15,000 toilets repaired, unblocked, taken apart. And he says: “What people think is clean and what is actually happening inside their pipes — those are two completely different worlds.”

The Ugly Truth Your Plumber Never Tells You

Everyone uses their toilet every day. Most people clean it regularly — brush, bleach cleaner, maybe a rim block under the rim. And then they think: job done.

But what happens behind the ceramic, where nobody ever looks? In the drain pipes that run from your toilet down into the sewer?

Thompson puts it like this: “Think of plaque on your teeth. You can run your tongue over your teeth ten times a day — the plaque stays. Only a proper clean removes it. That is exactly what happens in your pipes. Except you cannot see it — and nobody ever takes a brush to it.”

Biologists call it biofilm. A living layer of bacteria, fungi, limescale, grease and organic residue. It starts growing from day one and keeps building up. Every flush pushes water through — but the biofilm clings to the pipe wall like a ring that slowly closes in on itself. Scientists even speak of “biofilm armour”, because conventional methods barely touch it.

And here is the problem: Everything you scrub on the ceramic has zero effect on the biofilm inside the pipes. The surface shines — the pipes behind it keep silting up.

“I always tell my customers: you brush your teeth, but never the back of your throat. The toilet looks clean, but the pipes are a disaster.”
— Dave Thompson, master plumber, Manchester

The 4 Stages of a Blocked Pipe — and Why Stages 1 and 2 Are Invisible

In 28 years, Thompson has seen the same pattern over and over. Every blockage follows the same course — and it does not start when the water stops draining.

Why Conventional Cleaners Don’t Solve the Problem — and Often Make It Worse

Thompson has seen it all over the years. And he says: none of the usual products solve the actual problem.

Toilet Duck, Domestos & co.: They clean the ceramic. The liquid runs straight through the pipe with barely any contact with the pipe wall. That is like pouring water through a clogged pipe and hoping the buildup dissolves on its own.

Chemical drain cleaners (Mr Muscle, One Shot): Aggressive caustics that attack the top layer of the biofilm — but also the pipe itself. Older pipes turn porous and brittle. Thompson: “I have pulled out pipes that were completely eaten away by chemical drain cleaners. The blockage was gone — and so was the pipe.”

Plunger: Pushes the blockage a little further down. The biofilm is left completely untouched. The blockage is guaranteed to come back.

Drain rods: Drills a hole through the blockage. Water flows again — through a hole in the biofilm. The pipe walls stay just as filthy. Two months later, same story all over again.

Emergency plumber (£120–£300): Usually uses the same drain rods or high-pressure jetting. The pipe looks better for a few weeks — then the biofilm grows back, because the root cause was never removed.

The Discovery That Made Dave Thompson Sceptical — and Then Won Him Over

In the spring of 2024, Dave Thompson attends the Installer Show in Birmingham and gets talking to a colleague from Rotterdam. The colleague tells him about a cleaning powder that has been making the rounds in the Dutch plumbing trade for a few years. A powder you pour into the toilet, where it foams up and dissolves the biofilm inside the pipes from within.

Thompson is sceptical. In 28 years he has seen too many products that promised everything and delivered nothing.

But his colleague shows him a video: a pipe, completely scaled up inside. Powder in, water on top, foam rising. 30 minutes later: the pipe looks brand new.

“I watched that video three times,” says Thompson. “Then I ordered a tub on the spot.”

The product is called FizzClean.

Why FizzClean Works Where Everything Else Fails — Inside Your Pipes

The fundamental problem with every liquid cleaner is physics. Liquid flows downwards. It follows gravity, runs along the lowest point of the pipe and barely touches the side walls or the top. But the biofilm sits everywhere — 360 degrees all around.

FizzClean works on a different principle: foam.

The powder goes into the toilet and is activated with warm water. Within seconds it builds a dense, stable micro-foam that expands through the pipe — not downwards, but in every direction. The foam presses against the pipe walls, fills every cavity and completely envelops the biofilm.

Then the patented micro-foam technology gets to work:

Step 1: The foam completely surrounds the biofilm and penetrates its structure.

Step 2: Natural enzymes in the foam break down the organic components of the biofilm — grease, limescale, bacterial colonies, organic residue.

Step 3: One normal flush washes the dissolved biofilm away. The pipe walls are clean — like on day one.

“The first time I put FizzClean into an old pipe, I could literally watch the foam lift the buildup off the wall. After 30 minutes the inside of the pipe was pale grey instead of crusted over. After the second application it was clean.”
— Dave Thompson

What Most People Don’t Know: Your Pipes Are a Breeding Ground for Harmful Bacteria

This is not just about blockages. What most people never realise: the toilet is one of the biggest hygiene risks in the home — and not because of the ceramic.

Scientists at the University of Colorado have shown that every toilet flush creates a so-called “toilet plume”. Microscopic water droplets are hurled up to 1.8 metres into the air. Those droplets carry bacteria, viruses and fungal spores — and they come not only from the bowl, but also from the biofilm inside the pipes.

The particles land on your towel. On your toothbrush. On the floor. On every surface in your bathroom.

As long as the biofilm exists in your pipes, every flush is a bacteria shower for your bathroom. FizzClean removes the cause — not the symptoms.

FizzClean Works Everywhere Pipes Can Clog

What started as a toilet cleaner works everywhere pipes clog and biofilm grows:

Toilet: Biofilm, blockages, odours — the main use case.

Bathroom sink: Hair, soap scum, toothpaste residue in the pipes.

Shower/bathtub: Hair, shampoo residue, limescale buildup in the drain.

Kitchen sink: Grease, food scraps, oily residue in the drain.

Washing machine: Lint and detergent residue in the drain hose.

One product for every drain in the house. Instead of five different specialist cleaners that all only work on the surface.

Where Can You Get the Original? (Beware of Fakes)

FizzClean is available exclusively through the manufacturer’s official web shop. Not on Amazon. Not on eBay. Not at B&Q or Tesco.

Thompson gives an explicit warning: “Copycats are now popping up on Amazon and eBay that look similar but contain completely different ingredients. They foam up, but they do nothing to the biofilm. In the worst case they damage your pipes.”

Why not in retail stores? Because B&Q and Tesco, as middlemen, would have to nearly double the price. Selling factory-direct lets the manufacturer offer the best price — including fresh production, buyer protection and a money-back guarantee.