boiler water is mysteriously disappearing

Dan_43

my tenant is telling me that she is filling up the boiler 3 times a day and my mourning its 50 deg in the house because the low water shut off has kicked in. I am not finding any leaks in the system yet! my fear is that the boiler has a crack. there is no water on the floor there is no white smoke coming out the chimney. what are some ways to find the leak?
Happy holiday!
Dan

gerry gill

Do any of the

return pipes go under ground? if so you may have a leaky return pipe under the slab.

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ed wallace

dissapearing water

over fill the boiler see if its leaking into combustin chamber remove jacket see if there is a leak from cast iron sections check the air vents to see if they are properly installed check unions on radiators see if they are tight if rads are on rugs check rugs see if they are wet