Will Watts HKM20 4,0 Eco2/8 Standard Watts (10087348) fit my existing heating system?
Yes, this Watts unit (SKU 10087348, 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.



