Pressure Washer Quick-Connect Adapter Set — M22 to 3/8″ Brass, 8-Piece
$22.99
Eight-piece brass adapter set covering M22 to 3/8″ conversions in male and female configurations. The fix for when your new gun, hose, or foam cannon doesn’t match your machine’s outlet. Brass holds pressure and resists corrosion at the fitting — zinc alloy alternatives don’t.
The Fitting Problem Nobody Mentions Before You Buy
Pressure washer fittings are not standardized. M22, 3/8″, 1/4″, metric threads, quick-connects — manufacturers use different configurations, and what you buy for one machine doesn’t always connect to what you already own. This 8-piece set covers the M22-to-3/8″ conversions that resolve the most common residential fitting mismatch.
What’s in the Set
The 8 Adapters
The set covers M22 to 3/8″ in male-male, male-female, and female-female combinations — both M22*1.5 14mm and 15mm diameter variants where applicable. Specific combinations in the set:
- M22 male × 3/8″ female (most common hose connection mismatch)
- M22 female × 3/8″ male
- M22 male × M22 male (coupler)
- 3/8″ male × 3/8″ male (coupler)
- Additional variants covering quick-connect and thread combinations
Material
- Construction: Brass throughout
- Weight: 800g complete set
Why Brass Over Zinc Alloy
Zinc alloy adapters are cheaper to manufacture and look similar to brass. Under pressure cycling, zinc alloy corrodes at the threads — especially in climates with hard water or salt air. The corrosion creates micro-leaks and eventually seizes the fitting. Brass resists corrosion, maintains thread integrity under pressure, and can be removed and reinstalled without seizing. For a fitting that handles water and pressure repeatedly, the material difference is functional, not cosmetic.
Compatibility
Designed for residential electric pressure washers using M22 and 3/8″ connection standards. Check your machine’s outlet and your accessory’s inlet fitting before selecting which adapter applies. If you’re unsure, photograph both connection points — thread type and diameter together determine compatibility.
Frequently Asked Questions
How do I know which adapter I need?
Identify two things on each connection point: thread type (M22, 3/8″, 1/4″) and gender (male = threads on outside, female = threads on inside). Match the male end of one component to the female end of the adapter, and the other end to your target connection. If you have M22 male out of your machine and 3/8″ female on your gun, you need M22 female × 3/8″ male.
Will brass adapters corrode in outdoor storage?
Brass oxidizes slowly in outdoor conditions but doesn’t corrode in the way zinc or iron does. Surface patina develops over time without affecting function. Rinse and dry after each use to keep fittings in good condition.
