Air Compressor Pressure Switch With Adjustable Unloader And Relief Valve Preset 135 to 175 psi Four Port 26 Amp 220V Built In On Off Lever For Easy Control And Reliable Performance In Garage And Shop

Single 4-Port 135-175 psi Pressure Switch for Compressors
✔️ 4-Port base, adjustable 135-175 psi, 220V, on/off lever

This four port pressure switch is built for air compressors, with an integrated unloader valve and relief valve, designed for garage and workshop use. It supports 220V operation and includes a built in on/off lever for quick control.

✅ Preset auto start at 135-175 psi
✅ 30-40 psi differential for smooth cycling
✅ 6.3 mm (0.25 in) unloader valve connection
✅ 1/4 in NPT female connections for standard fittings
✅ 4-port base supports multi-directional mounting

💡 What is an air compressor pressure switch used for and how does it help your setup?

In practical terms, this handy device controls when the compressor starts and stops to hold the right pressure while protecting the machine.

• Handy for automatic on/off control to keep air pressure in a set range
• Unloader valve helps ease restart and cut overload on startup
• Designed for 220V systems with standard 1/4 in NPT fittings