Will Hydrolux differential bypass valve, gunmetal / bronze alloy 50-500mbar DN32(11/4) – 5501-05.000 (5501-05.000) fit my existing heating system?
Yes, this IMI Heimeier unit (SKU 5501-05.000, category: Balancing & control valves) is manufactured to European EN 12828 hydronic standards. Verify the connection thread or nominal size (e.g. DN15 1/2", DN20 3/4", M30×1.5 or Danfoss RA Click) – our engineering advisor Vytautas lists directly compatible mating components on this page.






