Altecnic Differential BY-PASS Valve 22mm Straight ER-22MMSTRBI Eres

This is a straight differential by-pass valve designed for use in 22mm pipework. It allows for the controlled diversion of water within sealed heating systems to maintain efficient operation when thermostatic radiator valves are closed.

Typically fitted in domestic or light commercial central heating circuits, the valve helps prevent unwanted pressure build-up and protects the boiler. Suitable for installation as part of refurbishment or upgrades where stable system flow is required.