20-Year-Old Pipes, Brown Water, And Why Your House May Have A Hidden Problem
For homeowners in houses older than 20 years, ageing galvanised iron pipes may be quietly rusting from the inside — a problem most people only discover when the water runs brown, and one that a standard water filter cannot solve.
Open the tap after a week away, and the water comes out brown.
For many Malaysians living in homes older than 20 years, that is not a problem with the water supply company.
It is a pipe problem — and the filter outside the house will not help.
Most homes built more than two decades ago were fitted with galvanised iron, or GI, pipes — a standard at the time that has since been replaced by PVC.
Over the years, those GI pipes rust from the inside, particularly at the elbows and joints where water slows and sediment collects.
The rust does not show until it does — usually after a period of no use, when stagnant water has had time to sit against corroded metal.
Replacing the entire pipe system in a double-storey home costs between RM15,000 and RM20,000 — and is only practical before a family moves in.
For anyone already living in the house, that option is effectively off the table.
A small number of specialist companies in Malaysia offer an alternative.
Using citric acid-based solutions and specialised equipment, they flush and clean the existing pipe system — a service that typically runs around RM500.
The process is not designed to be done at home; the equipment and method require professional handling.
Speaking to TRP, Sia says the service is particularly relevant for homeowners who leave their properties vacant for extended periods.
A week-long holiday is enough for rust sediment to visibly discolour the water when the tap is next turned on.
He also draws a clear line that many homeowners miss: the external filter installed at the water meter protects against impurities in the water supply from the utility provider.
It does nothing for rust originating inside the home’s own pipes.
