Dreyoo Air Compressor Pressure Switch 135-175 PSI, 4-Port 20A | 0-200 PSI Gauge & 200 PSI Brass Safety Valve

Upgrade your air system with the Dreyoo Air Compressor Pressure Switch, a purpose-built replacement designed to deliver safety, precision, and ease of use for everyday pneumatic work. Engineered to operate within a 135–175 PSI window, this switch provides a reliable on/off profile that helps your compressor start smoothly and stop safely as pressure builds. The unit turns on around 135 PSI and turns off near 175 PSI, offering a stable operating range that can help protect the motor from overload and reduce unnecessary cycling.

Its four 1/4" NPT ports provide flexible connections for gauges, safety valves, outlets, and other pneumatic components. Whether you’re wiring a new DIY compressor, expanding an existing system, or integrating with an air tool line, the universal 1/4" interface makes compatibility straightforward. A 0–200 PSI calibrated gauge delivers a clear read on current pressure with tight tolerance, so you can monitor changes in real time and respond as needed.

Durability is built into the design. The brass safety valve provides reliable relief at high pressure, while the high-strength plastic housing and alloy base resist corrosion and wear. These materials are chosen to endure the rigors of workshop use, helping maintain performance over time even with frequent cycling and demanding tasks.

Precise control with practical adjustability

The factory preset 135–175 PSI setting offers a solid baseline, and you can fine-tune the cut-in and cut-out thresholds with the red lever. When you want to adapt the system to different tools or tasks, small adjustments can help you tailor the response without swapping components. The reading accuracy stays under ±3%, helping you observe pressure changes in near real time and refine your setup.

Safety, reliability, and quick setup

Designed for 110–120V circuits and a 20 A rating, it fits typical shop power configurations. The brass safety valve adds a robust layer of protection, guarding against accidental overpressure up to 200 PSI. The kit is designed for plug-and-play installation, minimizing downtime when you replace worn or failing switches.

What you get and where it fits

• Four 1/4" NPT female ports enable flexible connections and future expansion.
• Universal compatibility with most single-stage and two-stage air compressors.
• A complete replacement set for upgrading a DIY pneumatic system or servicing a professional line.

Whether you’re building a new air system, upgrading a workshop setup, or maintaining an existing compressor, this switch offers a balanced mix of control, safety, and durability. It’s a practical choice for enthusiasts and professionals who value consistent pressure behavior and straightforward maintenance, without promising results you cannot guarantee.