To filter house water, also referred to as tap water, you first must understand the contamination you are in need of removing. This is best done by having a sample of your tap water tested. These tests will tell you if you are dealing with a high iron level, high calcium level, or even a high chlorine level in your tap water.
House water filters will sometimes be referred to as whole house filters. These will vary in complexity and costs. A reverse osmosis system is much more expensive than the basic passive filter that depends on water pressure to force the water through the filter. The reverse osmosis system is also more technical to maintain. If this system should fail, it can obstruct the whole house water supply. The passive water filters for whole house applications will have a bypass valve in case something goes wrong or to keep from shutting off the water supply while changing the filters. The passive whole house water filter system will have a variety of options for sediment and mineral filtration. These passive systems are also available in multiple stages. These are great for applications where you have high levels of both sedimentation and minerals. You can set up a cascade where the larger sediments are filtered first, then the minerals and even a final particulate filter for real small micron filtration.
When you select your system to filter house water, next consider where you are going to mount the unit and ease of servicing the system.