The Vaillant Connection Tube primary heat exchanger and the secondary heat exchanger are the two different types of heat exchangers that might exist. Almost all boilers have a primary, which is a heat transfer device that enables heat to be transported from the burner to the water in the system.
Supplied with 1 O-ring and 1 fibre washer
Technical specification
TypeTubeManufacturer Model No22597Brand NameVaillant