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Tourmaline Remineralization Filter — 1/4″ Quick Connect
TMF-QC
Final stage · Remineralization
This page covers where the filter goes, how to install it, what to expect, when to change it, and the parts that fit it.
Is this your filter?
Check these against the filter in your hand. All four should match.
- ✓A white inline filter about 10″ long and 2″ across
- ✓The label says Tourmaline · 100% natural tourmaline stone
- ✓1/4″ quick-connect ports at both ends and a flow arrow on the label
- ✓SKU / Reorder # TMF-QC on the label, and a QR code that opens this page
Tourmaline, mineral, alkaline or ORP? Check the label
- TMF — tourmaline, one media: adds a small amount of minerals for taste. This page.
- MIN — remineralization, mixed mineral media, a gentle pH raise. Remineralizing filters →
- ALC — alkaline, a stronger pH raise. ALC-QC support page →
- ORP — conditioning, alkaline + ORP + tourmaline media. ORP-QC support page →
- Other inline filters (sediment, carbon, DI) — see the full guide. Inline filter guide →
Specifications
| Model / SKU | TMF-QC |
| Media | 100% natural tourmaline stone |
| What it does | Adds a small amount of minerals (such as calcium, magnesium and potassium) back to RO or filtered water for a smoother, more natural taste (varies with source water and flow). It is not a contaminant filter: it does not reduce chlorine, sediment, fluoride or dissolved solids (TDS). |
| Position | Final stage — after the RO membrane and after the carbon post filter |
| Size | 10″ × 2″ |
| Connection | 1/4″ quick connect · elbow adapter for 1/4″ OD tubing included |
| Pressure / temperature | Max 90 PSI · 36–100°F, cold water only |
| Typical life | 6–12 months, depending on use |
| Brand | MyWaterClub |
Reorder this filter
This filter · TMF-QC
Tourmaline Remineralization Filter, 1/4″ QC
The price per filter drops when you buy 2 or more.
Where it goes
A tourmaline filter is always the final stage. It adds minerals to water that has already been filtered — keep your sediment, carbon and RO stages in place.
| Your setup | Order of stages |
|---|---|
| Countertop RO | Faucet adapter → sediment (SED) → pre-carbon (CAC) → RO membrane → post filter (PAC) → tourmaline filter → faucet |
| Under-sink RO | Pre-filters → RO membrane → storage tank → carbon post filter → tourmaline filter → RO faucet |
Placement rules
- Before any carbon filter — no. Carbon takes out part of what this filter adds. Put the tourmaline filter after it.
- Before the RO membrane — no. The membrane would remove the minerals the filter adds.
- Together with another mineral, alkaline or ORP filter — choose one final-stage filter.
- Hot water lines — not for hot water. Cold water only, 36–100°F.
Connections
Before you cut anything
- This filter fits 1/4″ OD tubing, the size on most countertop and under-sink RO systems. Check your tubing — the size is usually printed on it. For 3/8″ tubing, use 1/4″ stem × 3/8″ elbows.
- Water must flow the way the arrow on the label points — toward the faucet.
- You need a tubing cutter (or a sharp utility knife), a towel and a small bucket.
- Cut the tubing square. A cut off by about 15° or more will leak. The last inch should be round, smooth and free of scratches.
- Remove any blue C-clips from the ports. A clip left in stops the tube from seating.
- Push the tube in until it stops, about 5/8″, then pull gently to confirm it holds. Use the included elbow where a straight run would kink the tubing.
- Refit the blue C-clips on every quick-connect port.
To remove a tube later: turn off the water and release pressure, take off the C-clip, push the collar in toward the filter and pull the tube out while holding the collar.
Installing on an RO system
First time? Watching a short video helps: search YouTube for “add inline filter to RO system”.
- Shut off the RO water supply (and the tank valve on an under-sink RO), then open the RO faucet to release pressure.
- Find the spot: after the carbon post filter, right before the faucet.
- Cut the tubing square over a towel.
- Connect the filter with the flow arrow pointing toward the faucet, and refit the C-clips.
- Secure the filter with a clip: a 2.5″ × 2″ clip onto the membrane housing, or a 2″ × 2″ clip onto another inline filter.
- Turn the water back on. Check for leaks now, after 10 minutes, and the next day.
- Flush for at least 5 minutes with the RO faucet open, until the water runs clear. On an under-sink RO, let the tank fill, then discard the first full tank.
- Write the install date on the label.
What to expect
- Taste: RO water tastes flat because the membrane removes almost all minerals. This filter adds a small amount back, so the water tastes smoother.
- TDS goes up a little after this filter. That is expected — it is the minerals being added. Measure TDS right after the RO membrane to judge the membrane.
- pH: tourmaline changes pH only slightly. If you want a measurable pH raise, an alkaline (ALC) filter is the better choice.
- First few gallons: may look slightly cloudy from fine mineral dust. It clears with flushing.
When to change your filter
| Filter | Typical life | Change sooner if… |
|---|---|---|
| Tourmaline filter | 6–12 months depending on use |
The water tastes flat again, the TDS rise after the filter is gone, or flow drops |
Change it at the same time as your carbon post filter to keep it simple.
Parts that fit this filter
| Part | Notes |
|---|---|
| Carbon post filter (PAC-QC) | Goes right before this filter |
| 1/4″ stem × 3/8″ quick-connect elbow, 2-pack | Connects this filter to 3/8″ tubing |
| Blue C-clips for 1/4″, 10-pack | Locks the tube in a 1/4″ port |
| 2.5″ × 2″ mounting clips, 2-pack | Clips the filter onto an RO membrane housing · 2″ × 2″ clips |
| 1/4″ OD tubing, white | If you need extra length · tubing cutter |
Common questions
| What you’re seeing | Most likely cause |
|---|---|
| Cloudy water or fine particles from a new filter | Mineral dust or trapped air. Flush for at least 5 minutes; it clears within a day or two. |
| TDS is higher after this filter | Expected — the filter adds a small amount of minerals. Judge the RO membrane by testing before this filter. |
| pH barely changed | Normal for tourmaline. For a stronger pH raise, use an alkaline (ALC) filter instead — not both. |
| Drip at a quick-connect port | Tube not fully in, scratched or cut at an angle, or the C-clip was left in. Release, recut square, push it fully in and refit the clip. |
| Low flow at the faucet | Filter installed backward or kinked tubing. Check the arrow and the tubing. |
Need help?
Call or text (858) 345-7345.
Scope note: This is a remineralization filter for taste, not a contaminant filter. It does not reduce chlorine, sediment, fluoride or dissolved solids. We make no health claims about tourmaline. Use it on municipally treated or otherwise microbiologically safe water.
Please note: Mineral levels, taste and filter life depend on your source water, flow rate and usage, so results vary from home to home. This product is not a substitute for testing your water.