Many manufacturers recommend periodic flushing of water heaters to remove sediment that can build up. The sediment can cause discoloration of the water and make the water heater less efficient.
Clogged Plumbing Fixtures
Customers sometimes report white particles that clog plumbing fixtures. This may be bits of calcium carbonate scale coming from your water heater. The scaling may be worsened because the water heater thermostat is too high. If the particles are calcium carbonate, you probably need to flush your water heater. Be sure to follow the manufacturer's owner's guide for your water heater.