Water Filters - need help

K Charles has answered your question but I would like to add a bit of advice. Run a 1 micron sediment filter in your primary housing and a .5 micron charcoal in the secondary. This will give you the best filtering and best tasting water you can get with out getting very fancy with your filter system. I ran a 2.5 x 10 set up in our Class A based on my experience with the well system at the house. At the house I change out my 1 micron 2.5 x 10 sediment filter monthly and the .5 micron 2.5 x 10 charcoal every other month. In the RV I just pulled them out when we would return from a trip so the sediments would not start to decompose and cause an odor issue. Our water at home has a bit of sulfur in it and this filter combo along with a softener keeps the odor out and gives us unbelievable drinking water. I pay $3.00 each for the sediment and $9 for the charcoal. Occasionally the charcoal filters are on sale for $5-$7 and then I pick them up 10 per order.
Randy