Robertshaw FP-45 Freeze Protection Valve, 43°F Open

Description

The Robertshaw FP-45 is a reliable freeze protection valve engineered to automatically open at 43°F (6°C), providing a critical safeguard against freeze damage in HVAC systems, hydronic piping, and related plumbing applications. When ambient or fluid temperatures drop to the set point, the valve opens to allow water to flow or drain, preventing costly pipe bursts and system failures during cold weather conditions.

Key Features

• Automatic freeze protection — valve opens at 43°F (6°C) set point
• Designed to protect pipes, coils, and hydronic systems from freeze damage
• Self-actuating operation — no external power source required
• Compact, durable construction for long service life
• Easy installation in a wide range of HVAC and plumbing applications

Applications

• Hydronic heating systems
• Chilled water and cooling coil piping
• Exposed or unheated pipe runs
• Mechanical rooms and utility spaces subject to freezing temperatures
• Commercial and residential HVAC installations

Why Choose the Robertshaw FP-45?

Robertshaw is a trusted name in HVAC controls and valves, with decades of proven performance in the field. The FP-45 offers a simple, passive solution to freeze protection — no wiring, no controls, and no manual intervention required. When temperatures fall, the valve responds automatically to keep your system protected.

Specifications

• Brand: Robertshaw
• Model / SKU: FP-45
• Opening Temperature: 43°F (6°C)
• Valve Action: Normally Open on temperature drop
• Application: Freeze protection for HVAC and hydronic systems