Internal coach filter has been a 5 micron carbon block filter. I've bought at Home Depot, Lowe's and Amazon.
Now using an external triple filter system from Water Filter Store that has a sediment filter, a carbon block filter and a BIRM filter for heavy iron in the water in Michigan. These filters are .5 micron and 1 micron filters and adversely effect water pressure so I'll probably go back to 5 micron filters on re-order.
__________________
|