Xylem-McDonnell & Miller 354083 3/4″ NPT Short Probe w/ Self-Cleaning Tip for RB-122

The Xylem-McDonnell & Miller 354083 is a factory-replacement short probe designed specifically for the RB-122 Series low water cutoff controls. Featuring a self-cleaning tip, this probe helps maintain reliable water level sensing performance in boiler and hydronic heating applications by resisting scale and sediment buildup that can compromise accuracy over time.

Product Overview

The PA-RB-122 replacement probe is engineered to restore your RB-122 Series control to like-new sensing performance. The 3/4″ NPT connection ensures a secure, leak-free installation in standard boiler tappings, while the self-cleaning tip design minimizes maintenance intervals and extends service life in demanding hot water and steam boiler environments.

Key Features

• Direct replacement probe for RB-122 Series low water cutoff controls
• Self-cleaning tip resists scale, sediment, and mineral deposits
• 3/4″ NPT threaded connection for standard boiler tapping compatibility
• Short probe configuration for installations with limited immersion depth
• Genuine Xylem-McDonnell & Miller OEM replacement part (Model PA-RB-122)
• Maintains accurate water level detection to protect boiler from low-water damage

Application

Designed for use with McDonnell & Miller RB-122 Series low water cutoff and pump controllers commonly found in residential and light commercial hot water and steam boiler systems. Replacing a worn or fouled probe restores proper low-water protection and helps ensure safe, code-compliant boiler operation.

Specifications

• SKU: 354083
• Model: PA-RB-122
• Connection Size: 3/4″ NPT
• Probe Length: Short
• Tip Type: Self-Cleaning
• Compatible Series: RB-122
• Brand: Xylem-McDonnell & Miller