The SIP 3/8" Lower 4-Way Pressure Switch is ideal for starting and stopping electric compressor motors, and offers adjustable cut-off pressure and high durability for an extended working life. • 4-way 3/8" lower pressure switch; designed for starting/stopping on electric compressor motors • Integrated bleed facility with a 6mm pipe entry • Manufactured for prolonged use and durability • Offers simple adjustable cut-off pressure • Convenient and superb value-for-money.