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
