Check the listing for details. VRT3-310 EZ Start Adjustable Unloader Pressure Washer Pump 4500 PSI OEM. Condition: New. Listed at 42.99 USD. Newly introduced Mecline VRT3 Unloader is an updated version of the Arrow Line VRT unloader with a stronger valve body with less porosity. The pressure adjustment handle was redesigned for easier operation at all pressure levels. New Design Features: • Interior Design – more efficient flow and operation • Dual Locking Nuts – vibration resistant for setting maximum pressures • New Spring Material – more resistant to fatigue, powder paint resists rusting • Piston – large diameter, more strength and contact area for shifting alignment • Discharge Nipple – sealing o-ring has been moved to the lower part of the thread, increases hydro strength and fitting strength • Shutter Valve – hex design, less contact area for smooth shifting (prevents binding). larger size, longer life and more positive shifting Featuring: • Over sized handle – easier adjustment • Forged valve body – excellent strength • Two inlet ports • Two by-pass ports • Ultra thick inlet and discharge ports - added strength • Color coded springs and caps – easy valve identification • All ports are FNPT Specifications: • Spring Color: Black: • Replaces AL607 & AL607X • Maximum Pressure: 4,495 PSI • Max. Volume: 8.0 GPM • Adjustable pressure • Brass valve body • Max. Fluid Temp.: 194° F. • Inlet Ports (2): 3/8" FNPT • Discharge Ports (1): 3/8” FNPT • Bypass Ports (2): 3/8” FNPT