Honeywell Home DU145 22mm automatic bypass valve controls bypass flow to protect the boiler and save energy. Brass 22mm compression ends, lockable adjustable set-pressure, 0.1–0.6 bar differential, up to 50 L/min, max 110°C.

• Unique and simple adjustment mechanism
• Maximum working temperature is 110C
• Flow capacity is 3 metre per hour, up to 50 litres per minute
• Differential pressure is 0.1 to 0.6 bar
• Set pressure indicator, lockable adjustable knob
• 22 mm compression end
• Reduces system noise and maintains an even system pressure
• Ensures constant flow through the boiler
• The DU145 saves energy by only allowing flow through the bypass when needed
• Ensures constant flow through the boiler, protecting it during partial-load conditions.