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Shane always rocks. Beth

You work in a bubble for sure. Rod

The set nuts that are below the spring are designed as stoppers to prevent the unloader from being tightened beyond its desired setting. If you have employees that think if they crank the unloader down more I will get more pressure then you will want to use them otherwise they really are not necessary. To set them just move them up to the point where the unloader is set and lock them in place so the knob cannot be tightened any further. To set your unloader determine your max operating pressure you are going to achieve and size your nozzle accordingly (use a new nozzle). IE you want 2500 psi at 5.6 gpm then you want a #7 nozzle. Install your gauge in line for setting the pressure. For a flow actuated unloader you will have to pull the trigger as you are setting the pressure for a trapped pressure unloader you do not have to pull the trigger. Then tighten the knob or nut to the desired pressure then squeeze and release the trigger to be sure there is no spike when you release the trigger. IE if it is set for 2500 the gauge should not go beyond 1-200 psi above that when the trigger is released, if it does you have it tightened down too far. From that point if you want to drop the pressure your best method would be to use a larger nozzle and not mess with the unloader. If you back the unloader off to drop your pressure and do not use a larger nozzle all you are doing is reducing the flow rate. Also note that some unloaders require a certain amount of water to be running through the bypass line to operate properly. Remember an unloader is not a pressure building device it is a pressure regulating device it is designed to relieve (bypass) the water at a certain pressure that is all.