This type of headline (“clickbait”) often accompanies videos on social networks that promise miraculous machines made from waste. Although many of them are just visual tricks, there is one real and brilliant plumbing/kutilsk invention that uses just an old spring and piece of metal.

It is a self-made “cleaning spiral attachment” on a drill, which can clean even the most stubborn deposits in the pipeline, for which chemicals are not enough.

Ako tento “vynález” works (Domáca krtkovačka)
If you have an old, stiff spring and a piece of stronger sheet metal in your garage, you can make a tool that mechanically breaks down water scale or roots in pipes.

What do you need for this:
Stainless spring: It must be long and flexible enough to pass through thick pipes. Hrdza helps paradoxne here – the rough surface better removes dirt.
Plate (in tvare “V” or vrtule): Ten sa pevní na koniec pruziny. Serves as a rotating blade.
Vŕtačka: The second end of the spring is upne do skľučovadla vŕtačky.
Why is it “brilliant”?
This homemade invention replaces professional machines (called krtkov), which cost hundreds of euros.

Vibrations: When rotating the drill, the spring vibrates along the walls of the pipe and mechanically releases the deposits.
Flexibility: Spring sa ohne tam, kde by a solid rod failed.
Metal effect: The sharpened piece of metal at the end works like a cutter – it cuts through clumps of hair, rags or leftover food.
Table: Domestic invention vs. Purchased chemistry

Property Domestic spring with sheet Liquid cleaner (hydroxide)
Effectiveness on hair High (cuts ich) Low (lasts to long)
Price 0 € (discharge) 5 – 10 € per bottle
Speed ​​Immediate mechanical effect 30 – 60 minutes of waiting
Riziko Požné poškriabanie plasticu Riziko poleptania a tepla
⚠️ Safety warning
If you decide to try this “vinález” from the video:

Direction of rotation: Put the screw on low speed. If the spring in the pipe gets stuck and you add gas, it can twist and hit your hands.
Gloves: Always use sturdy work gloves. The spring is unpredictable in rotation.
My opinion: Often under these contributions, the production of a permanent magnet or an induction heater from a spring is also mentioned, but these are projects that require deeper knowledge of electrical engineering and can be dangerous.

Are you more interested in such mechanical vychytávky do dielne, or would you like to see other tricks to use old metal scrap in the garden?