SpringWell
SpringWell/Moen Premium Under-Sink RO Review (2026)
Severe contamination / problem wells
Whole House Water Treatment is reader-supported. When you buy through links on our site, we may earn an affiliate commission at no extra cost to you. Learn more.
Not sure which system fits your home?
Six questions, tailored to your city's real water data. No email.
Type
Under-sink reverse osmosis
Flow rate
~0.8 gpm at the faucet (typical RO)
Warranty
Limited lifetime on the system (verify on SpringWell)
Maintenance
Membrane + filters
Price tier
$$$$ (premium)
Best for
Severe contamination / problem wells
Key specifications
4-stage point-of-use RO with remineralization, dedicated Moen faucet. Serves the kitchen cold tap.
Our take
The SpringWell/Moen Premium Under-Sink RO is a strong fit for severe contamination / problem wells. As with any whole-house treatment decision, the right choice depends on your incoming water (hardness, chlorine vs. chloramine, any flagged contaminants) and the size of your home. If you haven't already, check your local water-quality data before committing.
What problem does it solve?
A premium under-sink RO that strips dissolved solids - PFAS, lead, nitrate, arsenic, sodium, fluoride - from your kitchen drinking water via reverse osmosis. Pairs with a Moen-branded dedicated faucet and includes a remineralization stage so the finished water is not flat.
Who is this for?
Homes that want certified RO-quality drinking water at the kitchen tap, especially where PFAS, lead or nitrate are the primary concern. Installs under the sink; no whole-house plumbing or re-pressurization required.
Pros
- Reduces PFAS, lead, nitrate, arsenic and fluoride at the kitchen tap
- Includes remineralization stage so finished water is not flat
- Dedicated Moen-branded faucet, looks like a fixture not a project
- DIY install in about an hour, no whole-house plumbing
- Solves drinking-water contamination issues carbon and softeners cannot
Cons
- Treats the kitchen tap only, not showers or laundry
- Wastes 1 to 2 gallons per gallon of finished water
- Membrane and filter swaps add up over time
- Overkill if your only issue is chlorine taste or hardness
Can I install this myself?
Plumber recommended
Under-sink install: connects to the cold-water line, drain saddle on the P-trap, and a hole in the countertop for the Moen faucet. No whole-house plumbing and no re-pressurization pump. Most owners finish in about an hour with basic tools.
What are the running costs I should foresee?
Pre and post filters every 6 to 12 months (about $50 to $100 per year). RO membrane every 2 to 3 years (about $80). RO also rejects 1 to 2 gallons of water per gallon produced, so factor in a small water-bill impact.
Frequently asked questions
+Who is whole-house RO for?
Homes with multiple contaminants of concern that a carbon or softener cannot handle: PFAS, lead, arsenic, nitrate, or high TDS. Also for anyone who wants RO-quality water at every tap rather than at one under-sink faucet.
+Can I install this myself?
Realistically, no. You need drain access, electrical for the pump, a storage tank with proper pressure regulation, and re-pressurization plumbing back to the home. Budget $1,500 to $3,500 for a plumber experienced with RO.
+What are the running costs?
Plan on $300 to $600 per year between pre/post filters, periodic membrane replacement, electricity, and 1 to 2 gallons of reject water per gallon produced. It is the most expensive option in this category to run.
+How is it different from an under-sink RO?
Under-sink RO treats one faucet for drinking and cooking. Whole-house RO treats every tap, every shower, every appliance. Choose under-sink unless your water-quality report shows contaminants you do not want touching your skin or laundry.
+Will it remove hardness too?
Yes; RO removes calcium and magnesium along with everything else dissolved. In most installs SpringWell recommends a softener upstream to protect the membrane and extend its life.
Ready to look at current pricing?
We don't display prices on this site because the manufacturer changes them frequently.