Crystal Quest Whole House RO Review: What the Published Specs Say

Crystal Quest sells a whole house reverse osmosis line across a wide range of flow rates, from 300 to 7,000 gallons per day, built around the same architecture covered in our guide to whole house reverse osmosis installation: a membrane bank, an atmospheric storage tank, and a repressurization pump.

What follows is what is published about the line — the specs, the sizing logic, and where the published information runs out.

The lineup

The RO system itself is sold across a range of published flow rates: 300, 400, 500, 750, 1000, 1500, 1800, 2500, 4000, 5000 and 7000 gallons per day, covering everything from a single-bathroom home to commercial-scale properties.

Storage pairs separately: an atmospheric tank in 165, 220, or 550 gallons, sized to the flow rate and the space available. Multiple retailers note the same instruction — measure the door opening before ordering, since the larger tanks do not fit through a standard doorway once assembled.

What is standard and what is added

The base system includes prefiltration to protect the membrane, plus the tank and a pump that draws water from storage as the house uses it.

Beyond that, the line is configurable rather than fixed:

• Remineralization — adds calcium and magnesium back into the water and adjusts pH, since RO output is naturally more acidic
• UV sterilization — a post-treatment stage for additional protection against microorganisms downstream of the membrane
• Stainless-steel rotary vane pump — an upgrade over the standard pump, with better resistance to high TDS and corrosive water
• Concentrate recycle valve — recycles part of the wastewater stream back into the feed to improve overall efficiency
• Digital TDS controller — monitors feed and treated water simultaneously

None of these are bundled by default across the line — confirm what is included in the specific configuration before ordering.

Rejection rate and lifespan

Published salt rejection across the line is 96 to 98.5%. Reverse osmosis membranes separate based on particle size and charge rather than targeting a specific contaminant list, so this figure applies broadly rather than to any one substance.

Multiple sellers cite the same service life: 15 to 20 years with prefilters and membranes replaced on schedule. That figure describes the membrane housing and pump assembly — cartridges themselves are a recurring replacement cost separate from that lifespan.

Where the published information runs out

Two things worth knowing before you compare this against SpringWell or Aquasana.

Pricing is configuration-dependent. Flow rate, tank size, and add-ons each change the total, and we have not verified current pricing for a specific configuration. Get a quote for your exact setup rather than assuming a flat number.

Certification claims vary by seller. Some retailers describe the line as NSF or WQA certified; the language is not consistent across listings, and we have not independently confirmed a certification registration for the point-of-entry RO system. If third-party certification matters to your decision, confirm the specific standard and registration directly with Crystal Quest before buying — do not rely on retailer copy alone.

Who this fits

Reverse osmosis for the entire house is a narrow decision, covered in more depth in our installation guide — it is justified by contaminant profile, not by wanting the most thorough filtration available. Where whole house RO is the right call, Crystal Quest's range of flow rates is one of the wider configurable lineups published, running from single-bathroom homes up to commercial volumes without changing manufacturer.

If your situation points to point-of-use treatment instead, installing RO under a kitchen sink covers what that job involves.