Watts 0182421 LWCO Dual Switch 50 PSI Head Only SAN50-D

Description

Watts 0182421 Low Water Cutoff – Dual Switch, 50 PSI Head Only (SAN50-D)

The Watts 0182421 is a low water cutoff (LWCO) head-only assembly featuring dual switching action, engineered for steam boiler protection in commercial and residential hydronic heating systems. Designed as a drop-in head replacement, this unit simplifies maintenance and upgrades without requiring full assembly replacement — saving time and reducing downtime on the job.

Product Overview

Low water cutoffs are a critical safety component in any steam boiler system, automatically shutting down the burner when water levels fall dangerously low. The SAN50-D head-only design allows technicians to replace just the control head while retaining the existing body, making it an efficient and cost-effective service solution.

Key Features

• Dual switch configuration for added control flexibility and safety redundancy
• Rated for 50 PSI steam boiler applications
• Head-only design — compatible with existing SAN50 series bodies for easy field replacement
• Reliable low water cutoff protection to prevent dry-fire boiler damage
• Engineered by Watts, a trusted name in boiler controls and hydronic system components

Specifications

• SKU: 0182421
• Model: SAN50-D
• Type: Low Water Cutoff (LWCO) – Head Only
• Switch Type: Dual Switch
• Pressure Rating: 50 PSI
• Brand: Watts

Applications

• Steam boiler systems requiring low water cutoff protection
• Replacement head for existing SAN50 series LWCO assemblies
• Commercial and residential hydronic heating installations