76 PCS Brass DOT Air Line Fittings Kit with 100ft 1/4in + 50ft 3/8in

In this review the CheeMuii 76 PCS Brass DOT Air Line Fittings Kit is assessed for users who need a complete pneumatic tubing solution for air suspension, truck or trailer repairs, and workshop plumbing. The bottom line: this kit combines long lengths of DOT-approved PA12 nylon tubing with a large assortment of CA360 brass fittings to deliver a durable, corrosion-resistant set that is useful for heavy-duty and DIY pneumatic work. The reviewer found it especially valuable where long runs and high working pressures are needed, and where a manual inflation point is required.

Key Features

• Complete kit: Supplies 100 ft of 1/4in and 50 ft of 3/8in DOT tubing with a wide range of fittings so users can assemble multiple pneumatic runs without sourcing parts separately.
• CA360 brass fittings: Push-lock and NPT-threaded fittings are corrosion resistant and meet D.O.T. FMVSS 571.106 and SAE J1131 requirements for reliable connections on air systems.
• Premium PA12 tubing: Polyamide 12 nylon lines meet DOT and SAE J844 standards, offering high temperature ductility and pressure resistance for automotive and industrial use.
• High working pressure: The 1/4in line can handle up to about 500 PSI and the 3/8in line up to about 800 PSI under recommended conditions, suitable for heavy-duty pneumatic tasks.
• Inflation point included: Two brass 1/4in Schrader valves provide manual inflation points for air springs and suspension bags, each with a protective cap to keep out dirt.
• Handy accessories: The kit includes two tube cutters to make clean, accurate cuts in the DOT tubing for leak-minimizing installations.

Who It's For

This kit is aimed at mechanics, RV and semi-truck owners, and workshop technicians who need DOT-compliant tubing and a broad range of brass fittings to repair or build air lines and suspension systems. It is also suitable for hobbyists who work on trailers, towing equipment, or pneumatic fixtures around a property and want a single kit that covers most connection needs.

Those who should look elsewhere include users who need metric fittings or specialty quick-disconnect couplers not listed in the kit, and anyone seeking factory-installed crimp fittings rather than push-lock and NPT-threaded connectors. If absolute leak-free performance is critical, plan to verify each joint during installation, as user reports about leak resistance are mixed.

Pros & Cons

Pros

• Comprehensive selection of fittings and long tubing lengths covers multiple projects without additional purchases.
• Brass CA360 fittings meet DOT and SAE standards, offering good corrosion resistance and durability.
• PA12 nylon tubing provides high temperature tolerance and strong pressure resistance for demanding applications.
• Includes Schrader valves and tube cutters for practical, ready-to-install value.

Cons

• Some users reported occasional leaks, so careful cutting and proper installation are required to minimize seepage.

Specifications

Package count	76 PCS (kit components)
1/4in DOT tubing	100 ft PA12 nylon
3/8in DOT tubing	50 ft PA12 nylon
Brass fittings	CA360 brass, includes tees, unions, connectors, 90 elbows
Schrader valves	2 brass 1/4in inflation valves with protective caps
Standards	D.O.T. FMVSS 571.106, SAE J1131, SAE J844 where noted
Working temperature	-40F to +248F (-40C to +120C)

Our Verdict

The CheeMuii 76 PCS Brass DOT Air Line Fittings Kit is a practical, value-minded choice for anyone who needs DOT-compliant tubing and a broad assortment of durable brass fittings for air suspension, truck or trailer repairs. It delivers strong materials, long tubing runs and useful accessories, making it good value for workshop and field repairs; just take care during installation to ensure tight, leak-free joints.

Frequently Asked Questions

Are the fittings DOT approved?
Yes, the CA360 brass fittings in the kit meet D.O.T. FMVSS 571.106 and related SAE requirements for air brake systems.

What pressures can the tubing handle?
The 1/4in DOT line is rated up to about 500 PSI and the 3/8in line up to about 800 PSI under the tubing manufacturer's recommended conditions.

Does the kit include tools to cut tubing?
Yes, two tube cutters are included to make clean cuts and help reduce installation leaks.