Identify boiler parts
OLD STYLE BOILER PUMP
TEMPERATURE  AND
PRESSURE GAUGE
OLDPRESSURE
GAUGE
GAS SHUT OFF VALVE
PUMP RELAY
BOILER GAS VALVE
ZONE VALVE
GAS BURNER CONVERSION
LOW WATER CUT OFF
HIGH LIMIT
MANIFOLD
NEW STYLE
EXPANSION TANK
BOILER ON OFF SWITCH
RADIATOR VALVE
NEW STYLE BOILER PUMP
BOILER 30 LB
PRESSURE  RELIEF
VALVE
BOILER FILL VALVE
BACKFLOW VALVE
OLD AUTOMATIC AIR VENT
Vent Damper
Old Zone Valve
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OLD STYLE EXPANSION TANK
NEWER ZONE VALVE