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Low Pressure Steam Boiler Codes
Hi all, I am the president of a coop in DC and we have a recently replaced (last 5 years) low pressure steam boiler for a 1-pipe heating system. The boiler services about 25 units in the building. We recently changed maintenance companies and the new company is recommending two additions to the boiler that I wanted a second opinion on.
The first is installation of a backflow prevention device on the water makeup line between the makeup feeder and where the line feeds into the boiler (through the condensate return). We already have a check valve in this location and I can't find where a backflow preventer is required by code. Any ideas on this?
The second proposal is for pigtails for each of our pressuretrol/gauges. I can see that this is best practice but we have no issues with these controls and the previous company said that the pipe from which these gauges read is sloped slightly so that is holds water and protects the gauges. Any thoughts you have on whether these are essential would be helpful.