Merrill MPSM12040 20/40 No-Lead Pressure Switch with Manual Lever

Features:

• Captive nut on cover
• Pressure switch pipe connection 1/4" female NPT
• Adjustment instructions are inside the top cover
• Contact points open on cut-out pressure - switch off
• Points close on cut-in or pressure drop - switch on
• Each turn of the adjustment screw = 2 PSI

Note: Factory set pressure range settings are +/- 8 PSI. A mechanical pressure switch factory set can not be more accurate and field adjustments may be needed. (This is not a defect). The maximum operating pressure of the pump and system the switch is to be used with must be a minimum of 12 PSI above the switch shut offsetting.