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ravenheat rsf 820/20?

the pressure on my boiler is below 1 how do i make it rise?
tasha, September 2009
look for the filling loop (usually a silver braided or blue plastic hose) and open the taps on the valves at either end until the pressure rises.

Ian, September 2009
link Click here to see other fixes for Ravenheat RSF 820/20.