Water Treatment ComponentsLow Pressure SwitchContact Us to PurchaseFeaturesSafety shutoff switch to turn off system when inlet water pressure is too low. Specification Model Type Spec Remark HL-0155 low pressure switch, standard 2 pin, inner thread NSF certified HL-0153 low pressure switch, standard 3 pin, inner thread top Application Suitable for use in RO drinking systems, purifiers, water treatment systems...etc.