So kitchens and bathrooms need cleaned regularly. The moisture and food in these rooms specifically make it easy for pathogens to grow. Plenty of people get mould problems in their homes. Kitchens need cleaned with disinfectant sprays to make them safe to produce food in.
What about the inside of taps though? Depending on the age of your house, the pipes and taps could be decades old, and will have never been cleaned on the inside, yet we don’t think twice about pouring a glass of water. Why is this? How are the insides not full of rust, grime and bacteria?
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Let me introduce you to Legionella. It mostly happens in stagnant warm water (usually underused hot water heaters) but has been known to grow in dead pipes. Think plumbing renovations in which a branch is capped and terminated but not removed at the branch.
Pressure at the termination will keep fresh warm water with bacteria from getting flushed out of the system while still at harmless levels. Kinda rare but there are some cases where a terminated pipe became a cesspool of bacteria which ended up growing into the main branch lines, causing great harm and illness.
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