BritTherm Automatic Сirculator Pump P4 Series P4 25/4-180 (661995603)

The BritTherm P4 25/4-180 Circulator Pump offers high performance and installation flexibility for modern HVAC systems. With a 180mm body length and 4-metre head, this 25mm pump is suitable for larger installations, heat interface units, and underfloor heating. Featuring 11 automatic work programmes and PWM remote control compatibility, it adapts to a wide range of heating demands while improving efficiency and control.

Designed for demanding domestic and commercial systems, the BritTherm P4 25/4-180 Circulator Pump combines intelligent functionality with exceptional flexibility. Its longer 180mm body makes it ideal for retrofits and systems requiring extended fitting space, while the 25mm connections and 4-metre head ensure reliable circulation across standard heating loops.

Equipped with 11 work modes—including AUTO mode, three constant pressure settings (CP1–CP3), and three proportional pressure settings (PP1–PP3)—the pump can automatically adapt to changing flow demands, making it perfect for underfloor heating and zoned systems. Traditional fixed-speed modes are also available for simpler setups.

The integrated PWM control interface allows for remote pump frequency management using compatible thermostats such as Siemens and Honeywell, supporting energy-saving smart home installations. Built-in electrical and thermal protection safeguards against system faults and ensures long-term reliability.

Features & Benefits:
✅ 25mm connections with a 4-metre head – ideal for compact and mid-size heating systems
✅ 180mm extended body – suitable for installations needing more reach
✅ 11 intelligent modes including AUTO, constant, and proportional pressure control
✅ PWM interface supports remote control from smart thermostats
✅ Compatible with major brands like Siemens and Honeywell
✅ Excellent for boilers, HIUs, heat pumps, and underfloor heating
✅ AUTO mode adjusts output to system needs automatically
✅ Electrical and thermal protection guards against damage
✅ Night power reduction for energy-efficient operation
✅ Simple user interface for fast setup and configuration

• Programs = 11 Control Programs with remote control function
• Maximum Head (Meters) = 4
• Flow (m3/h) = 2.5
• Power = 3~25
• Connection Size = 1 ½”
• Energy Efficiency Index Rating (EEI) = EEI≤ 0.20
• Maximum System Pressure (KPA) = 10 Bar
• Protection Class = IP44
• Temperature Class = TF 95°C
• Insulation Class = F
• Material = Cast Iron
• Supplied With (Loose in Box) = A set of threaded connections designed for fastening to pipes, high-temperature rubber gaskets, electrical cable 1.3 m long, pwm cable, insulation foam, data sheet and warranty instructions.

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