Point-of-entry water treatment systems are installed at main water lines, which are the first entry point of water in a residential or commercial establishment. It is also referred to as whole house water treatment.

The key application areas of point-of-entry water treatment systems include residential, commercial, and industrial sectors. Point-of-entry water treatment helps to further enhance the quality of water received from municipal water treatment plant, surface water and underground water. The application of point-of-entry water treatment systems in any of the sectors depend on the need for water softening, filtration, disinfection, sedimentation, removal of colour and smell as well as pH adjustment..

Specifications depend on the condition of water, volume of water required per day, and the required end-use. It is recommended for homes, schools, hospitals, offices, factories, hotels, worship places and other organisations where clean water is needed.