AL694 Mini Pressure Switch | 1/4 in Male, Reliable Pump Control

AL694 Mini Pressure Switch | 1/4 in Male, Reliable Pump Control

The AR AL694 Mini Pressure Switch – 1/4″ Male is a compact, high-precision control component
designed by Annovi Reverberi to regulate and maintain balanced water pressure in high-pressure cleaning systems.
Built with a 1/4-inch male threaded connection, this switch automatically activates or deactivates
the pump based on system pressure, supporting smooth pump cycling, consistent spray output, and extended equipment
life. As part of AR’s trusted AL Series, the AL694 combines compact size, durable construction, and reliable
performance for both professional and residential pressure washer applications.

Pressure Control Function

Automatic Start/Stop Regulation

The AL694 continuously monitors system pressure and engages the pump when pressure drops below a preset
cut-in point, then shuts the pump off when maximum operating pressure is reached. This automatic control:

• Prevents over-pressurization and dry running.
• Conserves energy by running the pump only when needed.
• Reduces wear on seals, valves, and other mechanical components.

Stable System Performance

By smoothing the start/stop cycle, the switch helps maintain steady spray pressure, preventing
surges, dropouts, or erratic flow that can affect cleaning performance and operator comfort.

Construction & Materials

Brass Housing & Reinforced Polymer

The AL694 is constructed from corrosion-resistant brass combined with reinforced polymer elements.
Brass offers excellent strength, machinability, and oxidation resistance, so threads and sealing faces retain their
shape and performance even after years of use in wet or chemical-exposed environments.

Internal Sensing Assembly

Inside the housing, a precision-calibrated diaphragm works with a sensitive electrical contact
system to detect pressure changes and issue immediate start/stop commands to the pump motor. This responsive
sensing keeps output pressure consistent and protects the system from unstable operating conditions.

Connection & Form Factor

1/4″ Male Threaded Interface

A 1/4-inch male threaded connection provides a precise, leak-free fit with standard ports on
pressure washer manifolds, valves, and pump outlets. The fixed, non-swiveling brass body preserves alignment and
sealing integrity under vibration and extended operation.

Compact Mini-Switch Package

The mini form factor makes the AL694 especially suitable for space-limited equipment such as
portable electric pressure washers, mobile cleaning units, and integrated pump systems where precise pressure
management is critical but installation space is at a premium.

Protection & Reliability

Sealed Internal Mechanism

A sealed internal design shields the diaphragm and electrical contacts from moisture, detergents, and debris,
extending service life and minimizing maintenance needs. The fixed body holds steady under load and does not rotate
during operation, maintaining consistent torque and alignment at the joint.

Factory Calibration & Testing

Each AR AL694 is engineered and tested to strict standards for pressure calibration accuracy, cycle
life, and leak prevention. Every unit is verified for reliable switching action and durable electrical performance
across thousands of cycles in real-world conditions.

Applications

The AL694 delivers smooth, automatic pressure regulation across a variety of high-pressure cleaning systems,
including:

• Compact consumer and professional pressure washers.
• Mobile cleaning units and detailing rigs.
• Small commercial wash bays and service shops.
• Agricultural sprayers and integrated pump modules.

In each application, the switch maintains stable system pressure, supports even spray patterns, and reduces the need
for manual pump control—improving both efficiency and equipment longevity.

Installation & Maintenance

Simple Installation

• Thread the AL694 into a clean, debris-free 1/4″ female port on the pump, manifold, or header.
• Start by hand to ensure square engagement, then tighten with standard tools to achieve a secure, leak-free seal.
• Connect the electrical leads according to the equipment wiring diagram, ensuring dry, solid contacts.

Low-Maintenance Operation

Routine care is straightforward: periodically inspect the threads for debris or wear, ensure electrical terminals
remain clean and dry, and verify pressure response occasionally to confirm calibration accuracy. With basic
maintenance and proper installation, the AL694 can provide years of reliable, automatic pressure regulation in
demanding cleaning environments.

AL694 Mini Pressure Switch | 1/4 in Male, Reliable Pump Control

The AR AL694 Mini Pressure Switch – 1/4″ Male delivers the ideal balance of compact size and
robust performance. By combining brass construction, refined pressure sensitivity, and largely maintenance-free
operation, it ensures stable pump cycling, reliable system protection, and consistent spray power—making it an
essential control component for any high-pressure cleaning system that values efficiency, longevity, and precise
pressure control.