BritTherm Сirculator Pump B4 Series B4 25/4-180 (661999003)

The BritTherm B4 25/4-180 Circulator Pump offers powerful and intelligent circulation of cold and hot potable water in a longer 180mm format. Designed for modern water systems, this advanced pump includes 9 automatic modes, including AUTO, constant pressure, and proportional pressure settings. With built-in energy-saving night mode and robust thermal and electrical protection, it delivers efficient performance, reliability, and flexibility for both domestic and light commercial applications.

The BritTherm Circulator Pump B4 25/4-180 is engineered for superior water circulation in larger installations, with its 180mm body offering a longer reach for retrofit and extended pipework setups. Ideal for potable hot and cold water systems, it provides 9 operating modes to suit various system demands, including AUTO mode for adaptive control, two constant pressure settings (CP1 and CP2), and two proportional pressure settings (PP1 and PP2).

The traditional three-speed manual mode ensures versatility, while night mode cuts energy use to just 5 watts during off-peak hours. Built-in protection against thermal and electrical faults helps prolong pump life and prevent failures due to external power conditions. This 25mm circulator pump delivers high efficiency, smart performance, and user-friendly operation in any system requiring a longer pump length.

Features & Benefits:
✅ Extended 180mm body for longer pipe centres
✅ AUTO mode for automatic system optimisation
✅ Three manual speed settings for user control
✅ Constant pressure modes for steady operation
✅ Proportional pressure modes for system efficiency
✅ Night mode with ultra-low 5W consumption
✅ 25mm connections for larger bore pipework
✅ Suitable for both hot and cold potable water
✅ Integrated electrical and thermal protection
✅ Ideal for modern domestic and light commercial installs

• Programs = 9 Control Programs
• Maximum Head (Meters) = 4
• Flow (m3/h) = 2.6
• Power = 5~22
• Connection Size = 1 ½”
• Energy Efficiency Index Rating (EEI) = EEI≤0.17
• Maximum System Pressure (KPA) = 10 Bar
• Protection Class = IP44
• Temperature Class = TF 95°C
• Insulation Class = F
• Material = Bronze
• Supplied With (Loose in Box) = A set of brass threaded connections designed for fastening to pipes, high-temperature rubber gaskets, electrical cable 1.3 m long, insulation foam, data sheet and warranty instructions.

At MacDonald Plumbing Supplies, we are committed to protecting your privacy and ensuring a secure shopping experience. We fully comply with UK data protection laws — please refer to our Privacy Policy for full details on how your information is used and protected.

When it comes to payment, we offer a range of trusted and secure options:

• Visa Debit & Visa Credit

• Mastercard

• PayPal

• PayPal Pay in 3 (interest-free instalments subject to T&C's)

All transactions are processed through secure, encrypted payment gateways, keeping your personal and payment information safe at all times.