6 Best Compression Fittings

Updated November 2025

Top Choice

1.

Corsair Hydro X Series Xf Compression 10/13mm (3/8"/ 1/2") ID/OD Fittings Four Pack

9.7

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2.

XSPC G1/4" to 3/8" ID, 1/2" OD Compression Fitting V2 for Soft Tubing

9.4

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3.

Lead Free Brass Union Coupling 3/8" COMP x 3/8" COMP Leak Proof Easy

9.3

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lowest price

4.

Dorman 800-141 Steel to Steel Fuel Line Compression Union - 3/8 In., Pack

8.8

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5.

XSPC G1/4" to 1/2" ID, 3/4" OD Compression Fitting V2 for Soft Tubing

8.6

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6.

3/8" x 3/8" OD Tube (Lead-Free) Brass Compression Union Fitting

7.9

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