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Tubing, Clips & Fittings

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Universal Repair Kit for Under-Sink Reverse Osmosis Systems (SKU# REPAIRKIT)

5.00 out of 5
Original price was: $49.96.Current price is: $39.00.
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. 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. 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 3/8″ OD Size Fits compatible fittings designed specifically for 3/8″ outside-diameter tubing. FLOW Higher-Flow Option Larger bore can reduce pressure drop compared with typical 1/4″ tubing in suitable applications. PE Polyethylene Construction Flexible tubing for routing through typical residential filtration installations. QC Quick-Connect Compatible Works with compatible 3/8″ push-fit fittings when tubing is cut square and fully seated. CUT Easy to Size Cut cleanly to the length required for installation or service. TW 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 typeReverse-osmosis / water-filtration tubing Tubing size3/8″ OD (outside diameter) MaterialPolyethylene (PE) ColorWhite Connection typeFor compatible 3/8″ push-fit / quick-connect fittings Available lengths3 ft, 10 ft, 20 ft, 50 ft Listed temperature range40–100°F Typical applicationsUnder-sink RO, pressure tanks, inline filters, refrigerators, ice makers, and higher-flow water-filtration connections Brand / manufacturerC.C.K. Country of manufactureTaiwan Listed package dimensionsN/A on current MyAquaFilter listing Listed package weightN/A on current MyAquaFilter listing SKUTU-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. ! 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. ! Use with compatible push-fit fittings 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. ! Pressure rating is not published 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. 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. Ask a Water Filter Specialist
This product has multiple variants. The options may be chosen on the product page Select optionsThis product has multiple variants. The options may be chosen on the product page

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

0 out of 5
Price range: $4.99 through $35.00
1/4″ OD RO Tubing — Clear, NSF Certified (Choose Length)
This product has multiple variants. The options may be chosen on the product page Select optionsThis product has multiple variants. The options may be chosen on the product page
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1/4″ OD Clear RO Tubing — Polyethylene for Quick-Connect Water Filter Systems, Choose 3–50 ft — SKU TU-14-C

0 out of 5
Price range: $2.99 through $24.99
1/4″ OD White RO Tubing — Polyethylene for Quick-Connect Water Filter Systems, 3 / 10 / 20 / 50 ft — SKU TU-14-W
This product has multiple variants. The options may be chosen on the product page Select optionsThis product has multiple variants. The options may be chosen on the product page
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1/4″ OD White RO Tubing — Polyethylene for Quick-Connect Water Filter Systems, 3 / 10 / 20 / 50 ft — SKU TU-14-W

4.00 out of 5
Price range: $3.99 through $24.99
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Membrane Housing Mounting Brackets – 2.5″ Diameter (2-Pack, SKU# CL-25)

0 out of 5
$2.99
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Elbow Fittings (2-Pack) – 3/8″ OD Tubing × 3/8″ OD Tubing , SKU# FT-EL-QC38-QC38

0 out of 5
$2.99
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Straight Quick-Connect Fittings (2-Pack) – 3/8″ OD Tubing × 1/4″ Thread (SKU# FT-ST-14-QC38)

0 out of 5
$2.99
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Straight Quick-Connect Fittings (2-Pack) – 3/8″ Thread x 1/4″ OD Tubing (SKU# FT-ST-38-QC14)

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$2.99
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1/4″ MNPT × 1/4″ OD Quick-Connect Elbow Fitting – Connects Inline Filter to 1/4″ OD Tubing (2-Pack, SKU# FT-EL-14-QC14-R)

0 out of 5
$2.50
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Elbow Reducer Fittings (2-Pack) – 1/4″ OD Tubing × 3/8″ OD Tubing, SKU# FT-EL-QC14-QC38

0 out of 5
$2.50
Large/Large 2.5"x2.5" Reverse Osmosis RO Clips (Set of 2)
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Large/Large 2.5"x2.5" Reverse Osmosis RO Clips (Set of 2, SKU# CL-25-25)

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$2.50
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RO Elbow Fitting – 1/8″ Thread x 1/4″ OD Quick Connect (2-Pack)

0 out of 5
$2.49
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Elbow Stem Connector Fittings (2-Pack) – 1/4″ Stem × 3/8″ OD Push-to-Connect, SKU# FT-EL-STEM14-QC38

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$2.49
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Reverse Osmosis / Water Filter Straight Ball Valve, 1/4" OD Tubing x 1/4" OD Tubing (SKU# BV-QC14)

4.50 out of 5
$2.49
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3/8-Inch OD (tubing) x 1/4-Inch MPT (thread) Quick Connect elbow fitting, package of 2 (SKU# FT-EL-14-QC38)

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$2.49
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C-rings for 1/4" OD fitting, qty 10, SKU# C-RING-14

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$2.00
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C-Clip Locking Rings for 3/8″ OD Quick-Connect Fittings (10-Pack), SKU# C-RING-38

0 out of 5
$1.99
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1/4″ OD 3-Way Y-Splitter Quick-Connect Fitting, SKU# FT-TEE-Y-QC14

0 out of 5
$1.99
Elbow Stem Connector Fittings (2-Pack) – 1/4″ OD Tubing × 1/4″ Stem Push-to-Connect, SKU# FT-EL-STEM14-QC14
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90° Elbow Stem Connector Fittings — 1/4″ Stem × 1/4″ OD Tubing Push-to-Connect, 2-Pack — SKU FT-EL-STEM14-QC14

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$1.99
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Tee Stem Fitting – 1/4″ Stem × Dual 1/4″ Quick-Connect Ports (SKU# FT-TEE-STEM14-QC14-QC14)

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$1.99
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Tee-Splitter Fitting – 1/4″ OD Tubing × 1/4″ OD Tubing × 1/4″ Thread (SKU# FT-TEE-14-QC14-QC14)

0 out of 5
$1.99
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Elbow Fitting Stem Connector, 1/4" OD Stem x 3/8" OD Tubing Elbow (Push to Connect)

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$1.99
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Reverse Osmosis Tee Connector – 1/4″ × 3/8″ × 3/8″ OD Quick Connect, SKU# FT-TEE-QC14-QC38-QC38

0 out of 5
$1.99
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Tee T-Splitter Fitting – 1/4″ OD Tubing × 1/4″ OD Tubing × 1/4″ OD Tubing, SKU#FT-TEE-QC14-QC14-QC14

0 out of 5
$1.99
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1/8″ MNPT × 1/4″ OD Quick-Connect Check Elbow Fitting for RO Membrane Waste Line, SKU# FT-EL-18-CH

0 out of 5
$1.99
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1/8″ MNPT × 1/4″ OD Quick-Connect Straight Adapter, SKU# FT-ST-18-QC14

0 out of 5
$1.99
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1/8″ Thread × 1/4″ OD Quick-Connect Elbow Fitting – Connects Standard RO Membrane Housing to 1/4″ OD Tubing, 4pcs, SKU# FT-EL-18-QC14

0 out of 5
$1.99

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Our Countertop Reverse Osmosis Systems come with a 30-day money-back guarantee. Filter cartridges include a 30-day limited warranty.

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