Whole House Reverse Osmosis Systems

A whole-house RO system treats all water entering the home at the point of entry, not just the drinking tap. It is designed for homes on well water with high TDS, arsenic, nitrates, or other pervasive contamination. Every tap, shower, dishwasher, and appliance receives purified water.

AMPAC USA whole-house systems range from 500 to 5,000 gallons per day. Sizing depends on household water demand, which averages 50 to 100 gallons per person per day. A storage tank and repressurization pump are required to maintain steady pressure throughout the home.

RO membranes produce water slowly. A storage tank accumulates treated water between periods of high demand. The repressurization pump then delivers that stored water at normal household pressure. Without both components, flow at fixtures would be too slow for showers, laundry, or simultaneous use.

Most installations benefit from sediment pre-filtration to protect the membrane and, for well water, a softener or iron filter to prevent membrane fouling. Iron above 0.1 mg/L and hardness above 7 GPG significantly shorten membrane life without upstream treatment.

With proper pre-treatment, membranes typically last 2 to 5 years. Systems handling very high TDS or iron may require earlier replacement. Monitoring permeate TDS with a handheld meter is the most reliable way to confirm membrane performance and schedule replacement at the right time.