Information
Overview
McDonnell & Miller model number 42S is a combination float-operated low water cut-off and pump controller for steam boilers that have a separate water column. This control features an automatic reset and two 120 volt, bi-metal, two-wire, single pole, single throw snap switches. Its maximum pressure is 50 psi and it has a tapped 1" FIP connection.
Specifications
Manufacturer (Brand) | McDonnell & Miller |
---|---|
Model | 42S |
MPN (Manufacturer Part Number) | 129302 |
UPC (GTIN) | N/A |
Application | Steam Boilers |
Voltage | 120v, 240v |
Connection Size | 1" |
Connection Type | NPT |
Max Pressure | 50 psi |
Installation Method | 1" Equalizing Piping |
Reset Type | Automatic |
Control Switch Model | SWA-42S |
Weight | 11.0000 |
Literature
- SSC Catalog McDonnell-Miller Pump Controls
- McDonnell & Miller Low Water Cut-Off Catalog
- McDonnell & Miller Low Water Cut-Off Parts List
- McDonnell & Miller Series 42S LWCO/Pump Controller Instructions
- McDonnell & Miller Pump Controllers Catalog
- McDonnell & Miller Pump Controllers Parts List
- McDonnell & Miller General Catalog (FULL)
- McDonnell & Miller Service Parts Catalog (FULL)
- SSC Catalog McDonnell-Miller LWCOs
Diagrams
Manufacturer

McDonnell & Miller, a unit of ITT Industries, is a leader in engineering and manufacturing boiler controls, liquid level controls, low-water cutoffs, and flow switches for steam and hot water boilers in industrial, commercial, and building trade applications. McDonnell & Miller specializes particularly in boiler controls and power switches.