Dishwasher drain hose or pump
Older models may have internal components that degrade into small metal fragments
Garbage disposal
Worn impellers or internal parts could break apart — but usually produce larger shards
Water softener or filter system
Rarely, resin beads (usually plastic, not metal) can leak — but they’re typically smooth and colorful
Old pipe fittings or valves
Corrosion or disintegration of internal washers/springs
If you don’t have a pull-out faucet, investigate these appliances next.
