GP ZK7.3 Flow-Sensitive Unloader – 3500 PSI, 6.6–10.8 GPM | Replaces K7.3

Model: ZK7.3
Category: Pumps → Pump Accessories → Unloaders / Regulators
Type: Flow-Sensitive Unloader Valve – Genuine OEM General Pump

The GP ZK7.3 Flow-Sensitive Unloader is a genuine OEM General Pump pressure unloader designed for high-flow pressure washer systems operating in the 6.6–10.8 GPM range. Utilizing a flow-through, flow-sensitive design, this unloader protects pumps and system components from overpressure and pressure spikes without relying on external springs or moving parts.

Best Applications

• High-flow single-pump pressure washer systems

• Systems using non-weep spray guns

• Applications requiring smooth pressure transitions

• Installations prioritizing durability and low maintenance

Specifications

• Flow Range: 6.6–10.8 GPM

• Maximum Pressure: 3500 PSI

• Maximum Temperature: 165°F

• Inlet Port: 3/8″ BSP-F

• Outlet Port: 3/8″ BSP-M

• Bypass Port: 3/8″ BSP-F

Product Details

Brand: General Pump
OEM: Yes – Genuine General Pump Part
Application: Pressure Regulation / Pump Protection
Unloader Type: Flow-Sensitive / Flow-Through

Key Features

• Genuine OEM General Pump ZK7.3 unloader

• Flow-sensitive, flow-through design for high-flow systems

• Eliminates high pressure in all lines during bypass

• Balanced piston for accurate and stable pressure adjustment

• Stainless steel and brass internal components

• No external springs or moving parts for enhanced reliability

• Easy to maintain and service

• Ideal for single-pump and non-weep gun applications