24/7 EmergencySandton · Midrand
    Plumbing

    Burst Flexi-Hoses: The Cheap Part That Floods Johannesburg Homes

    The braided flexi-hoses under your basins and behind your toilet are a leading cause of home floods. Why they fail, the warning signs, and how often to replace them.

    7 June 2026 5 min read
    Back to all articles

    It is one of the cheapest parts in your home and one of the most common causes of a catastrophic flood: the braided flexi-hose. Insurers see these failures constantly. Here is why they fail and how to stay ahead of them.

    What a flexi-hose is

    That silver braided connector linking your taps, toilet cistern, dishwasher and washing machine to the water supply is a flexi-hose. The braiding is stainless steel over a rubber inner hose — convenient to fit, but with a limited life.

    Why they burst

    Over years, the braiding corrodes and frays — accelerated by high water pressure and humidity under sinks. Eventually the inner hose ruptures, usually without warning, releasing water at full mains pressure. A failure while you are out or asleep can put thousands of litres through your home.

    The warning signs

    • Rust spots or discolouration on the braiding
    • Fraying or broken wire strands (it looks "furry")
    • A bulge or kink in the hose
    • Any dampness around the connections

    Check under your basins and behind your toilet occasionally — if you see any of these, replace the hose now.

    How to prevent the flood

    Replace flexi-hoses every 5 years as a rule, and fit a pressure reducing valve if your pressure is high — it dramatically extends hose life and protects your geyser too. Know where your main stopcock is, so you can stop a burst fast. Need hoses checked or replaced? We will sort it.

    Frequently Asked Questions

    A flexi-hose is the braided stainless-steel connector that links your taps, toilet and appliances to the water supply. The braiding corrodes and frays over time — accelerated by high water pressure — until the inner hose ruptures, often without warning, releasing water at full pressure.

    Related reading

    Need a Plumber or Electrician Today?

    Owner-managed by Garth Blair. We pick up the phone and book you in personally.