MJJC Foam Cannon S V3.0 Pressure Washer Foam Gun — 34 oz Bottle, 1/4" Quick Connector, Thick Snow Foam

MJJC Foam Cannon S V3.0 is a pressure-washer attachment that produces exceptionally dense, shaving-cream-like snow foam for safer, deeper cleaning of vehicles and surfaces.

Designed for use with a wide range of pressure washers, the V3.0 improves foam density, user control, and bottle stability while adding a convenient 1/4" quick connector. Upgraded internal parts and a redesigned bottle let you draw nearly every last drop of soap, adjust spray with more precision, and get thick foam using less concentrate. The set ships with a 34 oz (1 L) bottle, three orifice sizes for different washer pressures, and a sample soap formulated for foam guns to help you start immediately.

How does V3.0 make foam thicker than standard foam cannons?

The V3.0 uses revised internal geometry and foam-generation technology to mix air, water, and a small amount of detergent into a denser, creamier foam. This produces a clingy blanket of foam that stays on vertical surfaces longer for extended dwell time.

• Advanced V3.0 foam chamber for finer air-liquid mixing
• Works efficiently with minimal soap concentration
• Produces shaving-cream texture that adheres better to paintwork

Can I use this with my pressure washer and how do I choose the right nozzle?

The cannon operates across a broad pressure range (about 1300–3600 psi) but the orifice size must match your washer’s output. A 1.25 mm nozzle is preinstalled for mid-range machines; swap to the included 1.1 mm for lower-pressure cleaners and use larger nozzles for higher-pressure units.

• Preinstalled 1.25 mm orifice for 1600–2200 psi performance
• Included 1.1 mm nozzle for 1300–1600 psi washers
• Use ≥1.35 mm orifice (sold separately) for 2200+ psi machines

What practical upgrades did MJJC include in V3.0 to improve usability?

V3.0 brings six focused improvements: enhanced foam tech, smoother spray control, a redesigned liquid pickup tube, easier bottle attachment, a refined connector that needs no sealant, and a more stable bottle shape. Together these changes reduce hassle and increase consistency during use.

• 360° spray control with smoother adjustment mechanics
• Redesigned straw tube to empty bottle contents fully
• MJJC quick-fitting connection—no glue or PTFE tape required
• New bottle and cap design minimizes tipping risk

What soap should I use and how does product choice affect foam quality?

Foam density depends on both the cannon’s design and the detergent formulation. MJJC recommends using their foam-gun shampoo for best results, though many car shampoos will work—just expect variation in bubble size, cling, and dwell time.

• Optimal results with MJJC foam gun shampoo sample included
• If foam is weak, try a purpose-made snow-foam shampoo
• Adjust soap dilution and nozzle size to tune foam thickness

The package comes with a tamper-evident seal for secure delivery and includes the 1/4" quick connector adapter so you can attach faster to compatible lances. It’s supplied with a sample of MJJC soap to help you dial in foam right away.

Who is this for? The MJJC Foam Cannon S V3.0 suits car enthusiasts, detailers, and homeowners who want thicker, longer-lasting foam from their pressure washer. It’s ideal for people who prefer a minimal-soap approach without sacrificing cleaning coverage, those who need reliable quick-connect hardware, and anyone seeking a sturdier bottle and improved control when foam-lathering vehicles, motorcycles, RVs, or outdoor surfaces.