If the yellow water only appears from your hot tap, your water heater is likely the star of the show. Over time, sediment—mostly calcium carbonate and tiny rock particles—settles at the bottom of the tank. When you drain the heater, that sediment can flush out, turning your bathwater a dusty yellow.
This is easily fixed. Try flushing your water heater once a year: attach a garden hose to the drain valve, run the water until it runs clear, and you’ll restore clarity. It’s like a spring cleaning for your pipes.
Practical Tip: The Cold Water Test
Run your cold tap for a minute. If that water runs clear but the hot is yellow, your water heater needs a flush. If both are yellow, the issue is upstream—your city supply or main pipe.
Why Is My Bath Water Yellow? | Angi
