Reverse Osmosis Water Filter System RO-PH90 - Alkaline 90 GPD

In this review of the RO-PH90 under-sink system, the bottom line is simple: it is for homeowners who want long-lasting, truly clean drinking water with optional alkalinity. The reviewer found the system stands out because of its combination of WQA tested purification and US-made durable components, delivering crisp, neutral-tasting water suitable for coffee, cooking and everyday drinking without bottled water costs. Installation is reported as straightforward and the system is built to be serviceable for years.

Key Features

• Six-stage purification: Removes chlorine, taste, odor and over 1000 impurities so water tastes clean and fresh for drinking and cooking.
• pH remineralization: Adds US-made high-purity calcium carbonate to gently raise pH for users who prefer alkaline-tasting water.
• Long-lasting US filters: Built with 100% US-made filter elements and components designed for extended life and durable performance.
• Certified contaminant reduction: WQA tested to reduce fluoride, arsenic, lead, VOCs and other harmful heavy metals for safer household water.
• Premium faucet and fittings: Includes a 100% metal, lead-free designer faucet and JG quick-connect tubing for a secure, leak-seal installation.
• Lifetime support: Manufacturer offers lifetime support from WQA-certified specialists and an extended warranty option when registered.

Who It's For

This system is best for homeowners and renters who want a robust under-sink solution that provides high-capacity 90 GPD flow and comprehensive contaminant removal, including users concerned about heavy metals and fluoride. It suits people who appreciate US-made parts and the reassurance of WQA testing and lifetime support.

It is less suitable for those who need an ultra-compact countertop unit or who cannot accommodate an under-sink installation. If you require portable filtration or only occasional bottled-water replacement, a simpler pitcher or countertop filter may be more appropriate.

Pros & Cons

Pros

• Excellent water taste and clarity due to thorough multi-stage filtration and remineralization.
• Durable construction with 100% US-made filters and premium metal, lead-free faucet.
• WQA tested performance removing a wide range of contaminants for safer household water.
• Lifetime support and optional extended warranty provide long-term peace of mind.

Cons

• Under-sink installation requires basic plumbing work and space; one customer mentioned attention to system pressure for best performance.
• Replacement filters and occasional servicing are required to maintain peak performance.

Specifications

System type	Under-sink reverse osmosis with remineralization
Stages	6-stage RO with pH+ remineralization
Capacity	90 GPD (gallons per day)
Certification	WQA tested for 1000+ impurities
Faucet	100% metal, 100% lead-free designer faucet included
Filters	100% US-made long-lasting filter elements
Support	Lifetime support and optional 2-year extended warranty

Our Verdict

The RO-PH90 is a strong choice for anyone wanting dependable, high-capacity reverse osmosis filtration with the added benefit of pH remineralization and US-made components. It delivers noticeably improved taste and broad contaminant reduction, and the included metal faucet plus lifetime support make it a cost-effective choice for households committed to a permanent under-sink system.

Frequently Asked Questions

How difficult is installation?
Most customers report clear instructions and straightforward installation with standard under-sink plumbing skills; some may prefer professional help.

Does it add alkaline minerals?
Yes, the system includes pH+ remineralization using high-purity calcium carbonate to gently raise the water pH for a smoother taste.

What contaminants does it remove?
The RO-PH90 is WQA tested to remove chlorine, taste, odor, VOCs and many harmful contaminants including fluoride, arsenic and lead.