Interpump K7.3 Flow Sensitive Unloader Valve – 200 Bar, 25–41 LPM, 3/8" BSP

The Interpump K7.3 is a professional-grade flow sensitive unloader valve, designed to maintain consistent water pressure while protecting your pump and system from overpressure. Ideal for commercial and industrial pressure washer setups, this valve ensures smooth pressure regulation when the spray trigger is released—without the pressure spike typical of trapped systems.

Constructed from durable brass with stainless steel internal components, the K7.3 features a 3/8" BSP female inlet, 3/8" BSP male outlet, and 3/8" BSP female bypass port. With additional 1/4" BSP gauge ports for easy pressure monitoring, it provides the flexibility and safety needed for high-performance systems.

Suitable for flow rates from 25 to 41 litres per minute and operating pressures up to 200 Bar, it’s perfect for use with high-output pumps and engine-driven pressure washer units. Flow sensitive design means reduced component wear, improved user comfort, and increased system life.

The recommended minimum pressure of 40 Bar ensures optimal responsiveness and bypass control.