If the hole is on the arm nearest the pump inlet you have the EZ-SX pump

Connect most 1/4" quick connect spray tips and adjust between 3 positions

1/4" FPT inlet

16" wide with 4 x 1/4" MEG nozzles (85

PA VS30 Safety Relief Valve 510psi features_19-inch If the hole is onPA VS 30 safety relief valve protects your power washer pump and system from pressure spikes. Rated Pressure: 435psi (510psi maximum allowable). 3. 7gpm 90 C 195 F Inlet: 1 4" MPT Bypass: 1 8" FPT MPN: 60. 0560. 30 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.