Threlaco Pressure Washer Unloader Valve is a brass replacement valve designed to help control pressure and water flow in compatible pressure washer systems. This VRT3-310 style unloader is built for reliable performance and is intended for use where stable pressure regulation and pump protection are important.

This unit features a 3/8" female inlet, outlet, and bypass, with a maximum rating of 4500 PSI, 10.5 GPM, and 195°F. The adjustable locking nut design allows for precise pressure calibration, while the corrosion-resistant brass construction supports long-term durability in demanding cleaning applications.

• 1-pack unloader valve included
• 3/8" F inlet / outlet / bypass for compatible setups
• Maximum pressure: 4500 PSI
• Maximum flow: 10.5 US GPM (40 L/min)
• Maximum temperature: 195°F (90°C)
• Brass construction for strength and corrosion resistance
• Compatible with select AR, Comet, Cat Pump, BE, and Cat Pump 7630 systems

Why it matters: A quality unloader valve helps maintain smooth pressure control, protects critical pump components, and supports efficient operation. Professional installation and setup are strongly recommended to help prevent pump damage and ensure proper system performance.