@TOMBIG, Steam is extremely corrosive,Mark Hunt is appropriate.I'm a state licensed steam engineer and pending on town water, the water is acidic and we insert neutralizing amines into the steam to neutralize condensate.We also include caustic to the city drinking water to make a balance towards the h2o. 0 Also https://furnacerepair11086.wikicorrespondence.com/4046662/facts_about_heating_repair_revealed