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Better picture of the expansion tank. The plumbing ends at the expansion tank in this picture

The highest point is in a crawl space in the attic. Was hoping not to have to use the crawl space to bleed or purge every year. I bled the pipes in the attic with no resolve.

It doesn't seem like there are any bents on the system. I've bled the radiators without any true success. The heating people that have come out to look at it doesn't seem to have much experience with boilers and want to sell me a new one, for the most part. I just bought the house about 18...

Yes, there is a gauge on the boiler. Flo control valve is not leaking. The height is about 16 to 17' from basement floor to top of radiators on second floor, which are all base radiators in the attic. The main floor has standard radiators with a couple of real long radiators.

I have an older boiler that constantly rattles my pipes. Bleeding the radiators hasn't helped. There are three zones, one for each floor basement, 1st floor, and attic (2nd floor) with mechanical circulating pumps. that look to be on the return side of the circuit. There are several different...

I was smelling sewer gas in my basement and after trial and error I discovered that it may be coming from under the toilet. When removing the toilet to replace the wax ring, one closet bolt snapped while the other had no resistance. I found my cast iron flange was rusted out where one of the...