Maximize your flow output by siamesing any pressure washer with another that has a pressure trapped unloader. Just connect your existing hoses to the quick connects and add a 1/2” hose for flow 12GPM and up. 12GPM and below can use 3/8” hose. 

You can also request 1/2” fittings all the way around and run this on your rig directly from the whip lines and add DN15 ball valves. 1/4” mounting holes.