gravity system expansion tank installed by dead men

Dave Stroman

I have never seen it done this way, but, to worked. The line with the valve was simply used to fill the tank up about half way using the sight glass. The other 3/4 line should go to a drain somewhere or at least day light somewhere. Lots of times I see them go through the roof or tie into a main plumbing stack. That is your only relief point. The tank looks like it doubled as a radiator as I am sure it got pretty warm. Interseting

Dave Stroman, Denver

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hydronx_3

gravity system expansion tank

I can't ask the guys who installed this because they are dead so I will ask you guys. This is on a gravity system that an acquantaince is converting to forced circulation as he replaces the boiler (which did almost make it to 100). Here is a picture of the expansion tank/radiator hanging in the upper bathroom. It seems like the two smaller lines go down to the basement and tie into the hot and cold domestic lines? But I could be wrong, it seems that these two lines are the only ones in the house that they decided to hide in the walls.

bob young

yesteryear

Replaced a few of those babies years ago. the line going thru the wall was sometimes piped into an outside leader. they called it a telltale pipe. When you heard or saw the running water , you knew the system was full. some had a sight glass , some not. some were buried in ceilings.

Robert O'Connor_12

tank

I'm guessing this house had either a flat roof or an attic that was not easily accessible.

nice find!


Robert O'Connor/NJ