Check the listing for details. VRT3 Adjustable Unloader for Pressure Washer Pump 4500 PSI w/ Pressure Switch. Condition: New. Listed at 89.81 USD. Newly introduced Mecline VRT3 Unloader with Pressure Switch is an updated version of the Arrow Line VRT unloader with a stronger valve body with less porosity. Use for burner control or time delay switch. 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: • Integral switch detects full bypass mode• Use for burner control or time delay switch • Over sized handle – easier adjustment• Forged valve body – excellent strength• 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 AL687 & MV550MS • Maximum Pressure: 4,500 PSI• Max. Volume: 8.0 GPM• Micro Switch 6 AMP, 250 V• Adjustable pressure• Brass valve body• Max. Fluid Temp.: 194° F.• Inlet Port (1): 3/8" FNPT• Discharge Ports (1): 3/8” FNPT• Bypass Ports (2): 3/8” FNPT• Weight: 33.3 oz >