Adapters for WPS500

I believe the small quick connect that comes with the wps will work. You would just take the piece that your otc gauge connects to and install that quick disconnect instead.

I tried it and it won't lock on.

OTC has about 4 or 5 different quick disconnects.I have several otc tools and none of them are interchangable​.​Don't know why!!!

Ok, I just swiped the fitting off my OTC mechanical gauge and threaded it onto the adapter that came with the WPS. Should be good to go now.

You might need the Pico AST adapter kit #PP970. This is the set that works with most of the aftermarket FI master kits and converts the Foster 2 to a Foster 12FST fitting, but I have not tried it with the OTC specifically.