Note that this filter is directional and so must be installed correctly. That simply means that they installed the W-40 backwards and it simply needs to be reversed in the housing. Be sure to install the gasketed end towards the threaded side of your housing. Someone told me about adding a backwashing system to my existing filter. When used on a carbon system, it will remove the sediment buildup around the carbon, but does nothing to clean the actual carbon.
Carbon absorbs chemicals like a sponge absorbs water.
Once saturated, the carbon can no longer absorb any more chemicals and it must be disposed of. As of right now, we are not aware of any way in which the carbon can be cleaned and recycled. In many water heaters the anode rod is made of magnesium. A magnesium rod can be replaced with an aluminum rod to eliminate this problem. It can also be caused by sulphate-reducing bacteria, which thrive in the warm environment present in a water heater.