0020009865 Pressure Relief Valve

Vaillant 0020009865 Pressure Relief Valve

This part fits the following:

Vaillant VIH GB 125 S (2005-2010)
and Vaillant VIH GB 155 S (2005-2010)
with Vaillant VIH GB 180 S (2005-2010)
plus Vaillant VIH GB 210 S (2005-2010)
fits Vaillant VIH GB 260 S (2005-2010)
and Vaillant VIH GB 310 S (2005-2010)
with Vaillant VIH S 200 S (2005-2010)
plus Vaillant VIH S 250 S (2005-2010)
fits Vaillant VIH S 300 S (2005-2010)

The pressure relief valve helps to manage pressure build up within a central heating system.

It is set to proportionally react to increasing pressure in the system to prevent a dangerously high pressure build up within the system.