Honeywell Home DU144 automatic bypass valve (DU144A1001) maintains boiler flow and system pressure. Brass 22mm compression connections, 1.5 m³/h flow, factory-set 0.2 bar and lockable adjustment — ideal for domestic heating bypass circuits.

• Set pressure scale and protective cap
• Reduces system noise and maintains an even system pressure
• Unique and simple adjustment mechanism
• Ensures constant flow through boiler
• Lockable set pressure prevents inadvertent adjustment
• 22 mm compression end
• Maximum working temperature is 120C
• Flow capacity is 1.5m³ per hour
• Differential pressure is 0.1 to 0.6 bar
• Factory set at 0.2 bar