Replacement for the 3M 3 & 4 vessel units. #1 Filter
Who needs this filter? Anyone who has a 4-vessel unit - it is the #1 filter on that system.
Also, if you have a 3-vessel unit and your water application is well water, you will use a sediment filter as your #1 filter.
Compatible for the 3MROP411 filter
Want to have this AUTO-SHIPPED once a year? CLICK HERE
Replacement for the 3M 3 & 4 vessel units. #2
Who needs this filter? Anyone who has a 4-vessel unit - it is the #2 filter on that system.
Also, if you have a 3-vessel unit and your water application is municipal (city) water, you will use a pre-carbon filter as your #1 filter.
Compatible for the 3MROP12 filter.
Want to have this AUTO-SHIPPED once a year? CLICK HERE
Replacement for the 3M 4 vessel units. #3 or 4 Filter
Everyone needs this filter whether you have a 3-vessel or 4-vessel system. This is your #3 or 4 post-carbon filter.
Compatible for the 3MROP416 filter (formerly part # 3MROP414)
Want to have this AUTO-SHIPPED once a year? CLICK HERE
Replacement Membrane for the 3M Reverse Osmosis units. #3 Filter
Make sure to replace the membrane every 3 years. This is the component that provides the purified water!
Compatible for the 3MROM413 membrane