General Pump remote thermostat for pressure washers — 100538 panel-mount, 60" capillary, UL/CSA rated

The General Pump Remote Thermostat #100538 is a panel-mounted temperature controller that lets you set and maintain hot-water pressure washer temperatures up to the model's maximum rating.

This remote thermostat is built for commercial and industrial pressure-washing systems that require precise temperature control away from the boiler or heater. Offered in three maximum-temperature versions, the unit uses a 60-inch capillary tube and sensing bulb to transfer accurate readings from the wash system to a dual-scale knob on the control panel. UL/CSA electrical approvals and a robust electric rating mean it integrates with many hot-water pressure washer configurations.

How does this thermostat control water temperature on a pressure washer?

The thermostat monitors temperature at the sensing bulb and adjusts the heating system through the control circuit when the setpoint is reached or lost. The knob provides a clear dual-scale readout and a straightforward set-and-forget operation for operators.

• Capillary sensing bulb transfers temperature up to 4000 PSI.
• Dual-scale knob shows Fahrenheit and Celsius settings for easy adjustments.
• Panel-mount design places controls within operator reach.
• Electrical switching rated at 16(4)A-380V for compatibility with common systems.

Which temperature ranges and versions are available?

The thermostat series covers a wide operating range, with versions tailored to different maximum system temperatures so you choose the unit that matches your heater specifications. All versions allow fine adjustment within their safe range.

• Standard adjustment range: 86° to 250° F (30° to 121° C).
• Three model versions differ by the maximum temperature rating—select per your system’s max temp.
• Sensing bulb engineered for high-pressure environments up to 4000 PSI.
• UL/CSA approved for adherence to safety and performance expectations.

What are the installation and durability details?

Installation is designed to be straightforward for experienced technicians: the thermostat mounts to a control panel while the 60-inch capillary and bulb are placed at the sensing location. Durable components and approvals help the thermostat handle commercial workloads.

• Panel-mounted housing for easy access and operator visibility.
• 60-inch capillary tube for flexible placement of the sensing bulb.
• Bulb rated to 4000 PSI protects performance in high-pressure systems.
• UL/CSA approvals and rated switching capacity ensure electrical reliability.

How does this thermostat integrate with existing pressure washer systems?

Designed for compatibility with hot-water pressure washer heaters and boiler controls, the thermostat switches the heating circuit according to the setpoint and can be wired into standard control schematics. Confirm your system’s maximum permissible temperature before selecting the correct version.

• Electrical rating: 16(4)A-380V suitable for many commercial control circuits.
• Available in three max-temp variants to match heater limits and safety margins.
• Capillary and bulb length allow flexible sensor placement within the machine layout.
• Panel-mounted control keeps operator interface centralized with other controls.

Who is this for: The General Pump Remote Thermostat #100538 is intended for commercial or industrial users of hot-water pressure washers—service technicians, fleet operators, and facility maintenance teams—who need reliable, panel-accessible temperature control. Choose the version that matches your system’s maximum temperature rating, and use the 60-inch capillary for convenient sensor placement in high-pressure environments.