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Steam Traps - all created equal?
I just bought a large house that was built sometime between 1820 and 1860 (or rather, in fits and spurts throughout that period.) It has a new steam boiler and 10 large radiators. it's a 2-pipe system.
Most of the manual radiator valves do not work, and I'll be replacing those.
I suspect that many of the steam traps (most are Dunham 1E units) are not functioning correctly since they appear to have been neglected for decades.
1) Does it make sense simply to replace all the traps when I do the control valves?
2) Do I need to get the new MEPCO 1ESS units from here:
or can I go with these much cheaper Watts units: