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
