Sonic Foam System - Hex Nut and Key Grip Set - 42 Pieces - 34" (Large) garage This is the 1" (25mm)

This is the 1" (25mm) version of the piping

I don't like using them on my car

This fitting takes a 3/4" NPT (Male) thread and converts to a 1" Prevost pipe

This is the smallest option

This will screw directly onto the 1/4" or 3/8" NPT outlet of the hose

Sonic Foam System - Hex Nut and Key Grip Set - 42 Pieces - 34" (Large) garage This is the 1" (25mm)These are the tools I've decided to use at OGHQ, they have a nice quality to them with good ergonomics. They aren't intended to replace everything but there is a great variety of tools offered here. For the price you cannot beat them vs something that's 2x or 3x the cost like Snap On.