McDonnell & Miller 173502 | 157S Low Water Cut-Off & Pump Controller
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McDonnell & Miller model number 157S is a combination float-operated low water cut-off and pump controller for steam boilers with an integral water column. The controller has 1/2" NPT tappings for gauge glass and tri-cocks. This control features an automatic reset with two 120 volt bi-metal snap switches. One switch is single pole, single throw for pump control. The other is single pole, double throw for low water cut-off and alarm actuation. Its maximum pressure is 150 psi and it has a tapped 1" FIP connection.
Specifications
| Brand | McDonnell & Miller |
|---|---|
| MPN | 173502 |
| Model | 157S |
| M&M series | Series 157S |
| Application | Steam Boilers |
| Control switch | SWA-150S |
| Control reset | Automatic |
| Voltage | 120V, 240V |
| Connection size | 1" |
| Control connection | NPT |
| Max pressure | 150 psi |
| Installation method | 1" Equalizing Piping |
| UPC | 751875036297 |
| Alias | 157 |
| Weight (lb) | 40.77 |
| Dimensions (L × W × H) | 8.45" x 18.7" x 15.1" |
- SKU MM157-S
Most in-stock items ship within 1–3 business days. Once shipped, you will receive a confirmation email with tracking. Special-order items or items shipped from partner warehouses may require additional processing time. Orders ship via UPS or USPS depending on the item and destination. If you need a specific carrier, please contact us before placing your order.