MTM Hydro Pressure Washer Hose 50 ft Non‑Marking Gray — 3/8 in, 4000 PSI, Stainless Fittings

The MTM Hydro KobraJet is a 50‑foot, 3/8" non‑marking gray pressure washer hose built with stainless steel fittings and adapters for reliable 4000 PSI performance.

Designed for professional detailers and homeowners who demand a durable, flexible hose, the KobraJet balances high pressure capacity with a thicker inner wall to resist cuts and ruptures. Built and assembled in the U.S., this model includes rugged fittings and adapter options so it easily integrates with common pressure washer setups and proprietary M22 systems.

How does this hose hold up under high pressure and heat?

The KobraJet is rated to 4000 PSI and can handle temperatures up to 310°F, making it suitable for most cold- and hot-water pressure washing tasks. Its 2mm inner wall reduces the risk of pinholes or gashes during demanding use, while stainless steel fittings resist deformation when pressure spikes occur.

• 4000 PSI maximum working pressure
• 310°F maximum temperature tolerance
• 2mm inner wall thickness for puncture resistance
• Stainless steel fittings to withstand pressure surges

What fittings and adapters come with the hose, and will it connect to my machine?

The hose ships with a 3/8" Male NPT rigid end and a 3/8" Male NPT swivel end for straightforward attachment to most pressure washer guns and reels. MTM Hydro includes 14mm and 15mm twist coupling adapters so you can adapt to many proprietary M22-style connections without replacing hardware.

• 3/8" Male NPT rigid end x 3/8" Male NPT swivel end
• Includes 14mm and 15mm twist coupling adapters
• M22 adapter compatibility via included couplings
• Fittings designed to remain secure during pressure spikes

How long will the KobraJet last in corrosive or extreme environments?

This hose is constructed from high-quality components and assembled in the U.S. for consistent build standards. Its fittings and materials are tested to resist rust and corrosion up to roughly 125 hours—about double the expected lifespan compared with many industry alternatives—so it maintains reliability in harsh conditions.

• Assembled in the United States for quality control
• Corrosion resistance tested up to ~125 hours
• Durable outer cover and reinforced inner wall
• Suitable for repeated outdoor and marine use

Is the hose easy to manage during vehicle and property cleaning?

At 50 feet long and a 3/8" diameter, the KobraJet provides a good balance of reach and maneuverability for car washing, boat cleaning, driveways, and sidewalks. The non‑marking gray outer cover helps prevent scuffs when dragged across painted surfaces, and the swivel fitting reduces kinks during rotation.

• 50 ft length for extended reach without splines
• 3/8" diameter for flexibility and flow efficiency
• Non‑marking gray cover to avoid surface scuffs
• Swivel end reduces twisting and kinking

Who is this for: The MTM Hydro KobraJet 50 ft 3/8" Non‑Marking Gray hose is aimed at professional detailers, mobile washers, and serious homeowners who need a resilient, corrosion‑resistant hose with flexible adapter options. If you require long reach, high pressure capacity, and connectors that adapt to M22 or common NPT fittings while minimizing surface marking, this hose is a strong match.