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Ferroli 80E?

The boiler is building up the pressure to 3 after reducing it to 1.5 - new PRV value still do not stop the overflow.
JO, February 2008
check your filling loop is closed. it's a silver flexi pipe coming from the cold, going to the central heating return, thus filling the system with pressure.

r. parfitt, February 2008
link Click here to see other fixes for Ferroli.