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Above this area on the first floor, are 2 recessed radiators side by side in kitchen that is only heating when air vent is unscrewed, then put back in. One side of radiator is coming from end is the supply main (which is pitching away from boiler) and opposite side of radiator is going into beginning of return main (which is pitched toward boiler) I unscrewed 1.25 cap on the vertical and removed massive amounts of scale and mud, but was expecting it to be filled with condensate. You think new boiler will fill that sucker up, Im thinking about repiping it