Differential Bypass Valve Differential pressure bypass valve for heating systems where TRVs are installed. Maintains high return water temperature to inhibit rust.... More
Differential Bypass Valve 22mm 22mm. An automatic differential pressure Bypass Valve for use in systems where TRVs are installed. Provides a constant minimum flow whilst protecting the pump and system. Simple to read pressure indicator and low noise. Conforms to Part L, Building Regulations (2001).... More
