3-in-1: Alkaline (raise pH level), ORP and Tourmaline inline filter, 2″x10″, 1/4″ and 3/8″ Quick Connect (SKU# 3IN1-MAF)
$25.00
- Description
- Additional information
- Reviews (3)
Description
Alkaline + ORP + Tourmaline + Calcite Inline Filter
Upgrade your Reverse Osmosis system with this powerful 4-in-1 post-filter, combining Alkaline, ORP, Tourmaline, and Calcite media. Designed as the final stage, this filter restores natural minerals, boosts water quality, and promotes overall wellness.
✅ Health Benefits
Alkaline & ORP Media:
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Raises water pH to 8.5–9.5 (alkaline range)
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Reduces Oxidation Reduction Potential (ORP) to -50mV ~ -150mV
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Helps neutralize free radicals and supports cellular health
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Improves immune function and enhances metabolism
Tourmaline Media:
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Emits Far Infrared Rays (FIR) and negative ions
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Supports detoxification, circulation, and stress relief
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Enhances oxygen absorption and improves mental clarity
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Releases over 15 trace minerals into the water
Calcite Media:
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Naturally raises low pH water to a neutral or slightly alkaline level
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Helps correct acidic water (ideal after RO filtration)
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Adds beneficial calcium carbonate to improve taste and support bone health
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Provides stable, long-term pH correction for RO systems
🔧Quick Specs
- Filter Type: 4-in-1 Inline Post Filter (Alkaline + ORP + Tourmaline + Calcite)
- Size: 2″ × 10″
- Connections: 1/4″ & 3/8″ Quick Connect
- Ports: 1/4″ FNPT (Threaded)
- Connections: Includes 1/4″ or 3/8″ quick-connect elbow adapters
- pH Range: up to 8.5–9.5
- ORP Range: -50 mV ~ -150 mV
- Working Temperature: 40F-90 F
- Lifespan: ~400 gallons or approx. 6–12 months (varies by water quality)
- SKU / Reorder: 3in1-MAF
- Compatible SKU: ROR-A3
Ideal For
- Countertop RO and under-sink RO systems (final polishing stage)
- Customers who want alkaline drinking water with improved taste
- Neutralizing low-pH RO water and adding back minerals
- Systems using 2″ × 10″ inline post-filters
Installation Tips
Tubing & Quick-Connect Notes
- Common RO tubing sizes are 1/4″ OD and 3/8″ OD.
- Cut tubing with a clean, straight 90° cut for the best seal.
- Push tubing fully into the fitting until it stops, then pull back gently to confirm it locks.
Important Use Notes
- Use with cold water only.
- For best performance, install as the final stage after the RO membrane.
Not Sure Which Option to Choose?
- If unsure, select Universal Fit (includes 4 elbow adapters for 1/4″ & 3/8″ OD Tubing Connection)
- Message us before ordering—we’ll help you pick the right fittings.
▶️ Video Installation Guidance
Because RO systems and plumbing layouts can vary, there are multiple valid ways to install an inline filter.
- Search YouTube for “inline RO filter installation”
- Choose a video that matches your system type (under-sink RO, countertop RO, post-filter installation, etc.)
Visual step-by-step videos can make installation easier and faster.
Additional information
| Weight | 24 oz |
|---|---|
| Dimensions | 12 × 10 × 2 in |
3 reviews for 3-in-1: Alkaline (raise pH level), ORP and Tourmaline inline filter, 2″x10″, 1/4″ and 3/8″ Quick Connect (SKU# 3IN1-MAF)
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Frank D –
I’ve been using RO systems for years, and this is by far the best post-filter I’ve tried. After installing this 4-in-1 filter, the taste of my water dramatically improved—it’s smoother, less acidic, and has a refreshing mineral feel. I love knowing it adds back calcium and other essential minerals lost during RO filtration. The added tourmaline and ORP features are a real bonus. I feel more energized, and my digestion seems better too. It was easy to install and fit perfectly as the final stage. Highly recommend for anyone wanting truly healthy, alkaline drinking water from their RO system!
Nancy –
I’m happy with the water quality and the health benefits this filter offers—my water tastes noticeably better and my TDS readings went up slightly, which is what I wanted. My only minor complaint is that it slightly reduced the water flow at the faucet, possibly due to the dense media. Still, the performance makes up for it. I feel better using this compared to a plain post-carbon filter. Would buy again!
Linda from Oregon –
Excellent Upgrade for My RO System. I was looking for a way to remineralize and alkalize my RO water, and this filter did the trick. After a few days, I noticed a clear difference in taste—crisper and more natural. I tested the pH, and it consistently hits around 9. The filter also helped reduce that “flat” RO taste. I appreciate the mix of tourmaline, ORP, and calcite—definitely a step up from standard carbon-only post-filters. It’s reassuring to know it adds essential minerals too. Great value and fast shipping!