If you want to use all 4 nozzles order 2 extra nozzles

External plumbed unloader valve

General Pump - Interpump 51 Series TP2530 J34 triplex pressure wash pump

This kit connects with an M22 screw-type fitting

Vari-Nozzle with adjustable spray pattern and Hi/Low pressure

100726 Safety Relief Valve 2000 to 6000psi flow_5-6gpm If you want to useGeneral Pump adjustable safety relief valve protects your power washer pump from pressure spikes. Adjustable from 2000psi up to 6000psi Up to 6. 0 gpm 90 C 195 F max Inlet: 3 8" MPT Bypass: Side Discharge Does Not Replace the Unloader Valve. These safety valves are for use as a backup to an unloader or main relief in an open system without a trigger operated spray gun.