Safety anti-freeze valve CALEFFI model 108601, brass, 1" (S)

The CALEFFI Safety anti-freeze valve model 108601 is an inline brass valve with a 1" (S) connection designed to reduce the risk of freezing damage in plumbing and heating systems. Installed in water circuits where exposure to low temperatures is possible, this valve provides mechanical protection by releasing pressure or enabling controlled drainage when temperatures near freezing. Its brass construction ensures corrosion resistance and durability for residential and commercial applications where reliable freeze protection is required.

Advantages

This inline anti-freeze valve is made of brass for enhanced longevity and resistance to corrosion in typical water systems. The 1" (S) connection allows straightforward integration into existing pipelines and fittings. The device operates mechanically, providing passive protection without the need for electrical power or sensors. Its design helps prevent burst pipes and system damage by relieving excess pressure or allowing discharge when the fluid temperature drops to critical levels.

Suitable for

• Domestic heating circuits exposed to cold environments
• Commercial plumbing systems requiring passive freeze protection
• Seasonal or seldom-used water lines that risk freezing
• Service lines, outdoor faucets, and unheated spaces

Key specifications

• Material: brass body for corrosion resistance and durability
• Connection size: 1" (S) inline connection for pipeline integration
• Function: mechanical anti-freeze relief/drainage action at low temperatures
• Installation type: inline installation within water or heating circuits
• Typical application: freeze protection for potable and heating systems

How to use

Install the valve inline at a low point or at strategic locations in the circuit where freezing is likely to occur, following applicable plumbing codes and best practices. Ensure proper flow direction and secure connections using compatible fittings and thread sealing as required. The valve functions automatically; no electrical connection or active control is needed. Regularly inspect fittings and valve body for signs of wear, corrosion, or leakage and perform maintenance as part of routine system checks.

Usage recommendations

Fit the valve in accessible positions to allow inspection and maintenance. Verify compatibility with system pressures and fluids before installation. In systems with intermittent use or extreme cold exposure, combine mechanical anti-freeze protection with insulation and, where appropriate, controlled drainage or heating strategies to ensure comprehensive protection.