DOT Air Line Fittings and Hose Kit 43 Pcs - Durable DOT Brake Grade

Our review of this 43-piece DOT air line fittings and hose kit finds it best suited for DIY mechanics, truck and RV owners, and small shops needing DOT-compliant replacement lines and connectors. The single biggest reason to buy is the combination of DOT-approved CA360 brass fittings and PA12 nylon DOT air hose that provide corrosion resistance and high-temperature durability for air suspension and brake-related repairs. The set bundles lengths of 50 ft of 1/4' hose and 32.8 ft of 3/8' hose with a wide variety of fittings and a tube cutter for immediate installation.

Key Features

• Complete kit: Includes 50 ft of 1/4' DOT hose and 32.8 ft of 3/8' DOT hose so most runs for trucks, trailers, and RVs can be completed without extra purchases.
• DOT-grade brass fittings: CA360 brass fittings meet D.O.T. FMVSS 571.106 and SAE J1131 requirements, offering corrosion resistance and low permeability for long service life.
• Versatile connector selection: The kit supplies tee fittings, straight unions, straight push connectors, and 90 elbows to handle common routing and repair scenarios.
• Inflation points included: Two brass 1/4' Schrader inflation valves with protective caps provide convenient manual inflation points for air springs or suspension bags.
• Durable PA12 hose: Reinforced Polyamide 12 tubing meets DOT and SAE J844 specs, tolerates -40F to +248F and higher working pressures up to recommended limits for 1/4' and 3/8' lines.

Who It's For

This kit is ideal for vehicle owners who need DOT-compliant replacement air lines and fittings for air suspension, brake lines, trailer hookups, or RV systems and want enough lengths and connectors to complete a job without sourcing parts individually. Small repair shops and mobile technicians will value the variety of push-to-connect and NPT-thread fittings included.

It is less suitable for users who require metric-specific or specialty fittings not listed in the kit, or for high-volume shops that prefer bulk hose spools and specialized fittings by the piece. Also, installers who demand factory-matched crimps and permanent fittings for critical brake circuits should verify application requirements before substituting push-to-connect parts.

Pros & Cons

Pros

• High-quality CA360 brass fittings provide durability and corrosion resistance for DOT applications.
• Generous hose lengths of 50 ft (1/4') and 32.8 ft (3/8') cover many repair needs without extra ordering.
• Wide assortment of connector types and a tube cutter let users cut and join lines on site.
• PA12 tubing handles a broad temperature range and resists wear and impact.

Cons

• Some users report occasional leaks with push fittings, so careful installation and leak checking are required.
• The kit may include more general-purpose fittings than a specialist installer needs for high-volume or niche applications.

Specifications

Included hose	50 ft 1/4' DOT and 32.8 ft 3/8' DOT
Fitting material	CA360 brass
Hose material	PA12 Polyamide 12 nylon
Inflation valve	Two brass 1/4' Schrader valves with caps (thread length 3/4')
Connector types	Tee, straight union, straight push NPT, 90 elbow NPT
Working pressures	1/4' up to 500 PSI; 3/8' up to 800 PSI (manufacturer guidance)

Our Verdict

This DOT air line and fittings kit is a practical, cost-effective choice for DIYers, RV and truck owners, and small shops that need DOT-approved hoses and a broad selection of brass connectors. It delivers good value through DOT-compliant materials and ample hose length, though installers should perform careful fitting installation and pressure testing to avoid the occasional leak reported by some users.

Frequently Asked Questions

Are the fittings DOT compliant?
Yes, the brass CA360 fittings meet D.O.T. FMVSS 571.106 and SAE J1131 requirements according to the product details.

What temperatures can the hose handle?
The PA12 DOT hose is rated to operate from -40F to +248F, suitable for typical vehicle environments.

Does the kit include a cutter?
Yes, a tube cutter is included so hoses can be cut to length on site.