RO systems
Under-Sink & Higher-Flow RO
Useful for compatible main product-water lines, pressure-tank runs, post-filter connections, and other system locations designed for 3/8″ OD tubing.
3/8″ OD RO Reverse Osmosis Tubing – NSF-Certified Polye3/8″ OD White RO Tubing — Polyethylene for Quick-Connect Water Filter Systems, 3 / 10 / 20 / 50 ft — SKU TU-38-Wthylene , White Color, SKU# TU-38-W
Price range: $4.99 through $35.00
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Description
Higher-flow white tubing for RO & water filtration
3/8″ OD polyethylene tubing for compatible quick-connect drinking-water systems
This white 3/8″ outside-diameter polyethylene tubing is designed for compatible reverse-osmosis and point-of-use water-filtration systems. Its larger diameter can support higher flow with less pressure drop than typical 1/4″ tubing, making it useful for under-sink RO main lines, pressure-tank connections, inline filters, refrigerators, ice makers, and other 3/8″ OD applications.
3/8″ ODHigher-flow residential tubing size
PolyethyleneFlexible tubing material
WhiteC.C.K. tubing
3–50 ftChoose 3, 10, 20, or 50 ft
Applications
Use where a larger tubing diameter and higher flow are preferred
3/8″ OD tubing is commonly used in residential filtration systems where greater flow or reduced pressure drop is helpful. It works with compatible 3/8″ push-to-connect fittings and can be cut to the required length for installation, replacement, or repair.
Other applications
Filters, Refrigerators & Beverage Lines
Suitable for compatible inline filters, refrigerators, ice makers, and water-dispensing equipment that accept standard 3/8″ OD tubing.
Key benefits
Flexible tubing for clean, serviceable higher-flow connections
3/8″ OD Size
Fits compatible fittings designed specifically for 3/8″ outside-diameter tubing.
Higher-Flow Option
Larger bore can reduce pressure drop compared with typical 1/4″ tubing in suitable applications.
Polyethylene Construction
Flexible tubing for routing through typical residential filtration installations.
Quick-Connect Compatible
Works with compatible 3/8″ push-fit fittings when tubing is cut square and fully seated.
Easy to Size
Cut cleanly to the length required for installation or service.
Made in Taiwan
Manufactured by C.C.K. in Taiwan according to the current listing.
Available lengths
Choose the amount of tubing required for your installation
3 FT
Short Replacement Run
Useful for repairs and short component-to-component connections.
10 FT
General-Purpose Length
Suitable for many under-sink RO and inline filtration installations.
20 FT
Extended Installation
Useful for routing tubing across larger cabinets or to nearby appliances and filters.
50 FT
Bulk Service Length
Suitable for multiple installations, repairs, or longer custom tubing runs.
Specifications
Verified product details
| Product type | Reverse-osmosis / water-filtration tubing |
|---|---|
| Tubing size | 3/8″ OD (outside diameter) |
| Material | Polyethylene (PE) |
| Color | White |
| Connection type | For compatible 3/8″ push-fit / quick-connect fittings |
| Available lengths | 3 ft, 10 ft, 20 ft, 50 ft |
| Listed temperature range | 40–100°F |
| Typical applications | Under-sink RO, pressure tanks, inline filters, refrigerators, ice makers, and higher-flow water-filtration connections |
| Brand / manufacturer | C.C.K. |
| Country of manufacture | Taiwan |
| Listed package dimensions | N/A on current MyAquaFilter listing |
| Listed package weight | N/A on current MyAquaFilter listing |
| SKU | TU-38-W |
Compatibility checklist
- ✓Your fitting is designed for 3/8″ OD tubing
- ✓The application uses a compatible cold-water filtration line
- ✓The tube can be routed without excessive kinking or crushing
- ✓The selected length provides enough extra tubing for clean routing and future service
Installation
A square cut and full insertion are essential for a reliable push-fit connection
1
Measure the Run
Route the tubing with smooth curves and leave enough extra length for future servicing.
2
Cut at 90°
Use a tubing cutter or suitable sharp blade to make a clean, square cut without crushing or deforming the tube.
3
Push Fully Into the Fitting
Insert the tubing straight into the compatible 3/8″ quick-connect fitting until it passes the internal seal and seats fully.
4
Check the Connection
Give the tubing a gentle pull to confirm retention, then pressurize slowly and inspect the connection for leaks.
Before purchase
Good to know
!
3/8″ means outside diameter
Confirm tubing by OD, not inside diameter. This product is not a replacement for 1/4″ OD tubing.
Confirm tubing by OD, not inside diameter. This product is not a replacement for 1/4″ OD tubing.
!
Current page contains a size typo
The old description says this 3/8″ tubing is compatible with components using 1/4″ OD tubing. It should state 3/8″ OD compatibility.
The old description says this 3/8″ tubing is compatible with components using 1/4″ OD tubing. It should state 3/8″ OD compatibility.
!
Use with compatible push-fit fittings
Do not assume compatibility with 1/4″ fittings, compression fittings, barbs, or threaded connections without the correct adapter.
Do not assume compatibility with 1/4″ fittings, compression fittings, barbs, or threaded connections without the correct adapter.
!
Cold-water use
The current listing specifies a 40–100°F range. Do not use on hot-water lines.
The current listing specifies a 40–100°F range. Do not use on hot-water lines.
!
Pressure rating is not published
The current MyAquaFilter page does not provide a manufacturer-verified maximum working-pressure specification.
The current MyAquaFilter page does not provide a manufacturer-verified maximum working-pressure specification.
!
NSF wording needs exact-model verification
The current page states NSF/ANSI 42/58/61 certification, but the exact C.C.K. manufacturer trade designation and applicable certification scope should be confirmed before using those standards as a product-specific claim.
The current page states NSF/ANSI 42/58/61 certification, but the exact C.C.K. manufacturer trade designation and applicable certification scope should be confirmed before using those standards as a product-specific claim.
Confirm tubing outside diameter, fitting type, and application temperature before ordering. Specific NSF/ANSI certification claims should be published only after the exact C.C.K. tubing trade designation and certification scope are verified.
Not sure whether 3/8″ tubing is the correct size?
Measure the outside diameter of the existing tube or send a clear photo of the tubing and fitting.
Measure the outside diameter of the existing tube or send a clear photo of the tubing and fitting.
Additional information
| Weight | 8 oz |
|---|---|
| Dimensions | 10 × 10 × 2 in |
| Size | 10 ft, 20 ft, 3 ft, 50 ft |
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