Flakes in Your Hot and Cold Water Dispenser? Here's What's Causing It

Why Am I Seeing Flakes in My Water Dispenser?

Flakes or specks in your water dispenser are one of the most common service calls we see across Australian homes and offices. The good news is that in most cases the cause is straightforward and the fix is simple. Here's what each colour tells you.

Brown or Rust-Coloured Flakes

Almost always sediment — either from ageing internal components, a deteriorating filter cartridge that's well past its replacement date, or rust from the water supply line or fittings. If your filter hasn't been changed in over 12 months, this is the most likely culprit.

White or Off-White Flakes

Mineral deposits — calcium and magnesium scale that builds up in hard water areas. This is particularly common in parts of Queensland, South Australia and Western Australia where tap water has higher mineral content. Scale accumulates inside the tank and heating element over time and eventually breaks off into your water.

Black Flakes or Specks

The most urgent. They typically indicate one of three things: deteriorating rubber seals or gaskets inside the unit, mould growth in a tank or reservoir that hasn't been cleaned regularly, or carbon fines from a new or degraded filter cartridge. Black specks should be investigated and resolved promptly — don't continue using the dispenser until you've identified the source.

The Most Common Cause: An Overdue Filter Replacement

In the majority of cases, flakes in a hot and cold water dispenser trace back to a filter cartridge that's been left in service too long. Most replacement water filter cartridges have a service life of 6–12 months depending on usage and water quality. Once a cartridge is exhausted, it can begin to shed carbon particles or allow sediment to pass through — both of which show up as flakes in your glass.

If you're unsure which cartridge your unit uses or when it was last replaced, check our Replacement Water Filter Cartridges Guide for compatibility information across all Awesome Water models.

Step-by-Step: How to Diagnose and Fix the Problem

Step 1 — Identify the Flake Colour and Texture

Use a white cloth or paper towel to catch a sample. Colour and texture will point you to the right cause as described above.

Step 2 — Check Your Filter Replacement Date

If it's been more than 6–12 months, replace the cartridge first before doing anything else. This resolves the majority of flake complaints. Browse Awesome Water Filters replacement cartridges to find the right one for your unit.

Step 3 — Clean the Drip Tray, Spouts and Reservoir

Remove and wash the drip tray. Wipe down all spout surfaces with a food-safe sanitiser. If your unit has an accessible reservoir, drain and clean it according to your model's manual.

Step 4 — Inspect Seals, Taps and Internal Components

If flakes persist after a filter change and clean, the issue may be with internal rubber seals, tap valves or other components. Check our Water Cooler Spare Parts range for replacement taps, drip trays, valves and fittings compatible with Awesome Water units.

Step 5 — Check Your Water Supply Line (Plumbed-In Units)

For plumbed-in or bottleless coolers, inspect the supply hose and fittings for signs of corrosion or deterioration. If you're seeing rust-coloured flakes and the filter is fresh, the supply line may need replacing.

Preventing Flakes — Maintenance Schedule

Staying on top of this schedule will prevent the vast majority of flake and taste complaints. For full maintenance guidance visit our Awesome Water Filters FAQ.

Choosing a Water Dispenser That's Easy to Maintain

If you're experiencing repeated issues with your current unit, it may be worth reviewing your setup. Our range of freestanding water coolers and benchtop water coolers are designed for straightforward filter access and easy cleaning. For offices or commercial settings where maintenance needs to be minimal, a plumbed-in bottleless water cooler eliminates the need to handle bottles entirely and reduces contamination risk.

For any questions about your specific unit, visit our Awesome Water Filters FAQ or use our customer request form and we'll help you identify the right parts or replacement filter.