Caleffi 108 iStop 1 1/4" (DN32)

The Caleffi 108 Series iStop Anti-Freeze Valve is engineered to safeguard your heat pump systems against the detrimental effects of freezing temperatures. This 1 1/4" (DN32) valve automatically drains the circuit medium when the water temperature drops, preventing ice formation and potential damage.

• Freeze Protection: Prevents ice formation in system circuits.
• Automatic Drainage: Drains circuit medium when water temperature drops below 3°C.
• Brass Body: Durable brass construction ensures longevity and reliability.
• 1 1/4" Connection: Compatible with 1 1/4" (G 1 1/4" A (ISO 228-1) M, DN32) fittings and pipes.
• Maximum Working Pressure: Handles pressure up to 10 bar.
• Wide Temperature Range: Operates in medium temperatures from 0 to 65°C and ambient temperatures from -30 to 60°C.
• Replaceable Vacuum Breaker: Features a replaceable vacuum breaker for easy maintenance.
• Replaceable Thermostatic Cartridge: Equipped with a replaceable thermostatic cartridge (spare part code F89046).
• Vertical Installation: Must be installed vertically with the outlet facing downwards for proper drainage.
• Recommended Dual Installation: Install on both flow and return pipes for complete protection.
• Outdoor Installation: Designed for outdoor installation, away from heat sources and direct sunlight.
• Clearance Requirements: Requires at least 15 cm clearance from the ground and 10 cm between valves.
• Non-Insulated: Must not be insulated to ensure proper operation.

The Caleffi 108 iStop valve offers a reliable solution for maintaining the integrity of your heat pump systems during cold weather. Its automatic operation and durable construction provide peace of mind, preventing costly damage from freezing. With features like a replaceable thermostatic cartridge and vacuum breaker, maintenance is simple and straightforward, ensuring long-term performance.