ZK1 1/2" Unloader Valve – High-Pressure Unloader for Pressure Washer Systems

The ZK1 1/2" Unloader Valve is a high-performance pressure regulating valve designed to protect your pressure washer pump and components by controlling water flow and system pressure. Engineered for reliability and smooth operation, this unloader automatically bypasses water when the spray gun trigger is released, preventing overpressure and pump damage.

Built from industrial-grade brass and stainless steel internals, the ZK1 unloader offers excellent chemical resistance, durability, and consistent performance under continuous use. It’s ideal for commercial pressure washing, softwash booster systems, and industrial cleaning setups where precision pressure control and longevity are critical.

Specifications & Details:

• Product Type: Pressure Washer Unloader Valve

• Model: ZK1

• Inlet Port: 1/2"

• Outlet Port: 1/2"

• Material: Brass body with stainless steel internals

• Max Pressure: 4,000 PSI

• Max Flow: Up to 8 GPM

• Temperature Rating: Up to 195°F (90°C)

• Function: Regulates system pressure and diverts flow during bypass

• Applications: Commercial pressure washers, softwash systems, industrial cleaning, and trailer setups

Features:

• High-quality brass construction ensures long life and corrosion resistance

• Maintains consistent pressure for smooth operation

• Automatically diverts flow when trigger is released

• Protects pump from overpressure and heat buildup

• Easy to install and adjust with standard 1/2" fittings

• Designed for heavy-duty professional use