Knowing when to change a water filter.
Water filters should be changed when there is a drop in water pressure noticed after the filter. This would be lower flows at kitchen or bathroom taps or in the shower. If there is a pressure gauge located after the filter housing and you notice more than a 10 psi drop before and after the filter, then it should also be changed. A good rule of thumb is that all filters should be changed at least once a year to prevent low water flow in your home or cottage.