Product Information: The pressure relief valve helps to decrease pressure build up within a central heating system. It is set to open as the pressure increases to stop pressure building up and breaking the system.
This part is present in 19 different boilers in the Saunier Duval range including the Saunier Duval THEMAPLUS F 23 E , THEMIS 223 (CE) , THEMA C 23 , THELIA 623 NC , THELIA 623 .