Description
DI-QC Inline Deionization Ion Exchange (DI) Filter – Ultra-Pure Water Quality
Purpose:
Engineered for TDS removal and designed to deliver ultra-pure, zero-TDS water, this DI inline filter is perfect for applications demanding the highest water purity.
Ideal For
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Aquariums (Fresh & Saltwater): Ensures a stable, contaminant-free environment for sensitive aquatic life.
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Reverse Osmosis Systems: Commonly installed after the RO membrane and before the carbon polishing stage to remove the final traces of dissolved solids.
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Brewing, Hydroponics & Specialty Use: Excellent for breweries, labs, and any application that requires ultra-pure water.
Connection Type
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Standard Inlet/Outlet: 1/4″ Quick-Connect ports
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Optional fittings available:
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90° Elbow Stem Fitting: 1/4″ stem × 1/4″ QC (for tight or angled installations)
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Step-Up Fitting: 1/4″ stem × 3/8″ OD tubing
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Free Fittings: We can ship any 2 fittings free of charge with your filter order.
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If you need fittings, please mention it in the Customer Notes at checkout.
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Product Features
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Premium Resin: Packed with DuPont AmberLite MB20 mixed-bed ion exchange resin for superior TDS reduction and consistent ultra-pure output.
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Max Pressure: 90 PSI
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Temperature Range: 36–100°F
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Lifespan: 150 grains (lifespan depends on feed water quality and TDS level)
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Cold Water Use Only
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Easy Installation: Quick-Connect design for fast setup with standard tubing.
Specifications
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SKU / Reorder: DI-QC
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Manufactured For: MyAquaFilter by AquaJB
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Function: Final-stage polishing filter to achieve 0 TDS
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Media: Ion exchange mixed-bed resin
🔧Installation Tips
Tubing Size
- Most RO systems use 1/4″ OD tubing (standard RO size).
- Some countertop RO systems and specialty setups use 3/8″ OD tubing.
- Tubing size refers to the outside diameter (OD) of the tube.
When Do You Need Elbow Adapters?
- Select 3/8″ OD Tubing if your system uses larger tubing.
- We include 2 elbow adapters to connect the inline filter to 3/8″ OD tubing.
✔ No tools required
✔ Push-to-connect installation
When Do You Need a T-Fitting?
A T-fitting (1/4″ stem x 1/4″ OD Tubing x 1/4″ OD Tubing) is helpful if you are:
- Adding the inline filter to an existing 1/4″ RO line
- Want an easier install with a clean branch connection
- Installing between tubing lines without reworking your layout
✔ Optional accessory
✔ Makes installation easier for some setups
Not Sure Which Option to Choose?
- If unsure, select 3/8″ OD Tubing. The filter comes with 1/4″ connections, and we include two elbow fittings for 3/8″ OD tubing in the package.
- Message us before ordering—we’re happy to 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.
If you are unsure about your setup, we recommend:
- Searching YouTube for “inline RO filter installation”
- Watching a video that best matches your system type
(under-sink RO, countertop RO, post-filter installation, etc.)
Visual step-by-step videos can be very helpful and often make installation easier and faster.



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