McKillans Pressure Washer Quick Connect Kit M22-14mm to 3/8-inch — 304 Stainless with Viton O‑rings

McKillans M22-14mm Pressure Washer Quick Connect Kit is a complete set of 304 stainless steel M22-to-3/8" male and female quick-disconnects designed to convert and standardize your gas pressure washer fittings for reliable, leak-resistant connections.

This kit gives you every essential adapter and connector to replace mixed fittings on gas-powered pressure washers with a uniform stainless steel quick-connect system. It’s machined from 304 medical-grade stainless steel for corrosion resistance and longevity, and uses Viton O-rings for improved heat and chemical tolerance compared with standard rubber seals. Before buying, confirm your hose uses an M22-14mm plug; this kit will NOT fit hoses that require 15mm fittings commonly found on many electric models.

How does this kit improve my pressure washer setup?

Swapping older or mismatched fittings for stainless quick-connects reduces the chance of leaks and makes attaching tools faster and more secure. The kit standardizes connections so you won’t need to hunt for the right adapter each time you change accessories.

• Full set of male and female M22-to-3/8" quick-connect adapters
• 304 stainless steel construction for rust resistance
• Viton O-rings for longer wear and better chemical tolerance
• Simplified tool swaps without threaded wrangling

Will these parts fit my pressure washer and accessories?

They are made for gas-powered washers that use M22-14mm hose plugs and standard 3/8" quick-disconnect accessories. They are not compatible with hoses or machines that require a 15mm plug, so check your current fittings before purchase.

• Compatible with gas pressure washers with M22-14mm fittings
• Not compatible with 15mm plugs (commonly used on some electric units)
• Works with 3/8" quick-disconnect-style lances and gun fittings
• Includes both male and female adapters for versatile use

What makes the materials and seals different from cheaper kits?

The connectors are turned from 304 stainless steel rather than plated brass or zinc, which greatly reduces corrosion and galling over time. Viton O-rings resist higher temperatures and more chemicals than standard nitrile or EPDM, extending service life under tougher cleaning conditions.

• 304 stainless resists rust and maintains finish over time
• Precision machining for snug mating and less seizing
• Viton O-rings improve resistance to heat and detergents
• Stainless surfaces slide smoothly for easier connect/disconnect

How do I install these adapters without tools or special skills?

Installation is straightforward: the M22 female threads screw onto the pump or hose end, and the 3/8" quick-disconnect snaps into place with a push-fit action. Hand-tightening plus a half-turn with an appropriate wrench is usually all that’s needed; avoid overtightening stainless threads to protect the O-rings.

• Screw the M22 female onto your hose or pump outlet
• Push the 3/8" quick-connect into the mating male until it clicks
• Hand-tighten, then use a wrench for a final small turn
• Replace O-rings as routine maintenance when worn

Who this is for: This kit suits homeowners, detailers, rental shops, and pros who need durable, leak-resistant quick-connects for gas pressure washers using M22-14mm fittings. If you want to eliminate mixed-fit frustrations, upgrade to corrosion-resistant hardware, and keep connections serviceable under heavy use, this set gives the essential adapters and quality materials to do that. Do not purchase if your pressure washer requires a 15mm fitting; verify your hose diameter first to ensure compatibility.