YU21405 Unloader Valve – Green Spring (New Style), Up to 21 GPM, Up to 4000 PSI

Model: YU21405
Category: Pumps → Pump Accessories → Unloaders / Regulators
Type: Pressure Unloader Valve – Green Spring (New Style), High-Flow / High-Pressure

The YU21405 Unloader Valve is a genuine OEM General Pump pressure unloading device engineered for high-flow, high-pressure pressure washer systems. Featuring the new-style green spring, this unloader maintains consistent system pressure while protecting pumps, hoses, and operators from dangerous pressure spikes.

Specifications

• Maximum Flow: 21 GPM

• Rated Pressure: 4,050 PSI

• Maximum Pressure: 4,500 PSI

• Maximum Temperature: 200°F

• Inlet Ports: (2) × 1/2″ NPT-F

• Outlet Port: (1) × 1/2″ NPT-F

• Bypass Ports: (2) × 1/2″ NPT-F

• Construction: Brass body with stainless steel components

• Spring Type: Green Spring (New Style)

Product Details

Brand: General Pump
OEM: Yes – Genuine General Pump Part
Application: Pressure Regulation / Pump Protection
Unloader Type: Pressure Unloader / Bypass Valve

Key Features

• Genuine OEM General Pump YU21405 unloader valve

• High-flow capacity up to 21 GPM

• Rated for 4,050 PSI with 4,500 PSI max

• Green spring (new style) for updated performance

• Durable brass and stainless steel construction

• Multiple 1/2″ NPT ports for flexible installation

• Helps maintain stable pressure and prevent over-pressurization

• Ideal for commercial and industrial pressure washer systems