B&Q - 22mm Westco Angle Differential Bypass ValveAutomatic Pressure Control Valve For Central Heating Systems

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22mm Westco angle differential bypass valve for central heating system pressure control. Automatically regulates water pressure when thermostatic radiator valves close. Durable brass construction with corrosion-resistant finish for long-term performance. Helps reduce pump noise, system wear, and potential damage in heating circuits. Suitable for domestic and light commercial central heating installations; easy to fit to standard copper pipework.