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I know its a vague question but if a steam trap isn't working properly would it cause the radiators that the steam trap is down stream of not to heat up[ properly.
with out getting into the whole application of the boiler...............
I had three rads feeing steam from top ( 2 pipe) then the return was at the bottom............ that is where it would get cold then go another 20 feet with 3/4 to a steam trap. after steam trap it would go to a condensation pump.
the boiler feed was 2 inch gong top 1 1/2 for each rad, rad was hot until the very end , then I feel the return and it was cold.
Make log story short, boiler failed prematurally with piping issues and I think steam trap issue, customer agreed to change the steam traps on his dime.
the steam was returning cold which I feel could of been a problem.
any answers or follow up questions would be appreciated, customer has the whole summer to save money