EP Anti Freeze Valve M x F Swivel Nut

The Embrass Peerless Anti-Freeze Valve M x F Swivel Nut is designed to protect water-filled air source heat pump systems from freezing conditions. Featuring a male x female swivel connection, it allows quick, secure installation directly onto heat pump connections and tight plant areas.

The valve automatically discharges system water when temperatures fall to 2°C, preventing ice formation and protecting heat pump components and external pipework from damage. When temperatures rise above 4°C, the valve closes and normal system operation resumes.

Constructed from durable brass with a stainless-steel spring, this valve provides reliable, maintenance-free frost protection for modern ASHP installations.

Why it suits trade counters:

• Popular 1″ and 1¼” swivel connection options for heat pump installs
• Ideal for direct connection onto outdoor units and tight spaces
• Essential frost protection for monobloc ASHP systems
• Fully mechanical operation – no power or controls required

Key specifications:

• Max operating pressure: 10 bar
• Opening temperature: 2°C
• Closing temperature: 4°C (±1°C accuracy)
• Materials: brass body with stainless-steel spring