Heavy Duty Air Compressor Pressure Switch Replacement LF10 4H 135-175 PSI 20A Rating Universal Pump Control Valve With One Quarter Inch NPT Female Connection And Six Point Three Millimeter Unloader Valve For Your Rig

Heavy Duty LF10-4H Pressure Switch: 135-175 PSI range
✔️ 1/4 in NPT female (6.35 mm) connection, 6.3 mm unloader

This heavy duty pressure switch is a replacement part for air compressors, designed to control the start/stop cycling of the pump by sensing tank pressure. It’s widely used in home workshops and light industrial setups to keep pressure within a safe range.

✅ 135-175 PSI cut-in/cut-out range for stable pressure control
✅ 1/4 in NPT (6.35 mm) female connection for easy fittings
✅ 6.3 mm unloader valve connection for quick venting
✅ 4-port design with accessible pressure adjustment screws
✅ 20A rating handles motor loads reliably

💡 What is a common use case for a pressure switch in air compressors?

This handy device automates motor on/off based on tank pressure, protecting the compressor and keeping tool performance stable.

- Helps maintain consistent pressure by cycling at 135-175 PSI - Reduces motor wear and short cycling in shop compressors - Uses standard 1/4 in NPT fittings for easy integration (6.35 mm) - Suitable for residential and light commercial air systems