Will Comisa Extension piece, chromuotas (1″x60) (77.17.321) fit my existing heating system?
Yes, this Comisa unit (SKU 77.17.321, category: Pipe fittings & 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.



