My Mom is in her eightys. I called a plumber in Aug 2012, replaced the McDonnell/Miller LWCO low water cut off 47/2 $675.. Same plumber was called Jan 8,2013 back. He trouble shoot the problem and replaced the same unit, yet I still have the problem. After the heat come on for about 15 mins/ goes off.the pipes connecting to the MM LOCO the vibrating starts, shakes, and makes a loud noise. The boiler is steam, I know it's old. Do I call the same plumber or call someone differently?
The word "plumber" dates from the Roman Empire. The Latin for lead is plumbum. Roman roofs used lead in conduits and drain pipes and some were also covered with lead, lead was also used for piping and for making baths. In medieval times anyone who worked with lead was referred to as a plumber as can be seen from an extract of workmen fixing a roof in Westminster Palace and were referred to as plumbers "To Gilbert de Westminster, plumber, working about the roof of the pantry of the little hall, covering it with lead, and about various defects in the roof of the little hall". Thus a person with expertise in working with lead was first known as a Plumbarius which was later shortened to plumber.