If you want clean, great-tasting water without replacing your main kitchen faucet, the best solution is an under sink water filter with a separate faucet. These systems send filtered water to a small, dedicated faucet that sits next to your main tap. This setup gives you instant access to purified drinking water without mixing it with unfiltered tap water, making it both efficient and convenient.
Unlike basic filters that connect directly to your cold water line, separate-faucet systems usually offer multi-stage or reverse osmosis (RO) filtration. They can remove lead, chlorine, fluoride, pesticides, PFAS, and hundreds of other contaminants. Below, we’ve reviewed the best under sink water filters with separate faucets, all premium picks priced above $300 for lasting performance and reliability.
Quick Picks: Best Under Sink Water Filters with Separate Faucet
- Best Overall: APEC Top Tier 5-Stage RO System – Excellent contaminant removal and reliable included faucet.
- Best Budget: iSpring RCC7AK 6-Stage RO Filter System – Affordable, adds back healthy minerals, under $350.
- Best Premium: Waterdrop G3P800 Tankless RO System – Advanced, tankless, with a sleek designer faucet.
Buyer’s Guide: Why Choose a System with a Separate Faucet?
Before we get into the reviews, let’s cover why you might prefer a system with its own dedicated faucet:
- Cleaner Water: Keeps filtered water separate from your tap water for cooking and cleaning.
- Multi-Stage Filtration: Most systems use 3–7 stages for maximum contaminant removal.
- Better Taste: Removes chlorine and chemicals that affect flavor and smell.
- Space Efficiency: Compact design fits under the sink and connects easily.
- Convenience: Get purified water instantly without using up counter space like pitchers or countertop filters.
- Value: Higher upfront cost, but far cheaper per gallon than bottled water.
Detailed Reviews: Best Under Sink Water Filters with Separate Faucet
1. APEC Top Tier 5-Stage Reverse Osmosis System
Who it’s for: Households that want an affordable, proven RO system with a dedicated faucet.
- Key Benefits: 5-stage RO removes up to 99% of contaminants including fluoride, arsenic, and lead.
- Pros: Reliable, long filter life, easy DIY install, faucet included.
- Cons: Takes up more space than tankless systems.
Verdict: A top all-around choice with strong filtration and dependable faucet. Check Price on Amazon
2. iSpring RCC7AK 6-Stage RO System
Who it’s for: Families who want balanced-tasting drinking water with added minerals.
- Key Benefits: Adds calcium and magnesium after RO for better taste.
- Pros: Affordable, high contaminant reduction, included faucet looks elegant.
- Cons: Slightly slower water flow compared to premium models.
Verdict: Best for those who want healthy minerals in their water. Check Price on Amazon
3. Waterdrop G3P800 Tankless RO System
Who it’s for: Those who want a sleek, modern tankless RO filter with high capacity.
- Key Benefits: Tankless design saves space, smart monitoring, fast 800 GPD flow.
- Pros: Stylish, space-saving, premium faucet included.
- Cons: Higher upfront cost, but worth it for convenience.
Verdict: The premium choice for modern kitchens. Check Price on Amazon
4. Home Master TMAFC Artesian RO Filter System
Who it’s for: Households wanting cleaner water with natural mineral taste.
- Key Benefits: Adds minerals twice during filtration for fresh, balanced taste.
- Pros: Great-tasting water, long filter life, faucet included.
- Cons: Slightly bulkier than other under sink systems.
Verdict: A great mineral-enhanced water system. Check Price on Amazon
5. Frizzlife PD600 RO Under Sink Filter
Who it’s for: Homeowners who want high flow and eco-friendly water savings.
- Key Benefits: 600 GPD, 1.5:1 pure-to-waste ratio, tankless design.
- Pros: High efficiency, sleek faucet, compact design.
- Cons: Pricier filter replacements compared to traditional RO systems.
Verdict: An efficient and eco-friendly RO choice. Check Price on Amazon
6. Bluevua RO100ROP Countertop/Under Sink System
Who it’s for: Anyone who wants flexibility with a premium faucet system.
- Key Benefits: RO purification with optional under sink installation.
- Pros: Flexible use, strong contaminant removal, premium faucet included.
- Cons: More expensive than standard RO systems.
Verdict: A versatile RO system with quality faucet. Check Price on Amazon
Comparison Table: Best Under Sink Filters with Separate Faucet
| Name | Key Features | Stages | Price Link |
|---|---|---|---|
| APEC 5-Stage RO | 99% contaminant removal, included faucet | 5-Stage RO | View Price |
| iSpring RCC7AK | Remineralization, included faucet | 6-Stage RO + Minerals | View Price |
| Waterdrop G3P800 | Tankless, smart monitoring | Multi-Stage RO | View Price |
| Home Master TMAFC | Remineralization, long filter life | 7-Stage RO + Minerals | View Price |
| Frizzlife PD600 | 600 GPD, tankless, eco-friendly | Tankless RO | View Price |
| Bluevua RO100ROP | Versatile use, premium faucet | Multi-Stage RO | View Price |
FAQ: Under Sink Water Filters with Separate Faucets
1. Why choose a system with a separate faucet?
It keeps filtered water separate from regular tap water. This reduces wear on your main faucet and ensures the cleanest drinking water possible.
2. Do I need a plumber to install one?
Most systems are DIY-friendly and take about 1–2 hours to install. However, hiring a plumber can save time if you’re not comfortable with tools.
3. How often do I replace the filters?
Carbon and sediment filters last 6–12 months. RO membranes usually last 2–3 years depending on water quality.
4. Do these systems waste water?
Traditional RO systems do waste some water, but modern tankless options like the Frizzlife PD600 or Waterdrop G3P800 are much more efficient.
5. Can I use the separate faucet for cooking?
Yes — many people use it not only for drinking but also for cooking, coffee, tea, and baby formula.
Conclusion: The Best Under Sink Water Filter with Separate Faucet
When you’re ready to upgrade your water quality, the best under sink water filter with a separate faucet gives you clean, fresh drinking water right at your fingertips. Whether you prefer the dependable APEC 5-Stage RO, the mineral-enhanced iSpring RCC7AK, or the premium Waterdrop G3P800, each system on this list is built to deliver long-lasting performance.
Ready for better water? Pick one of the systems above today and enjoy clean, great-tasting water straight from your own faucet.