HEATING SYSTEM PRESSURE
Posted by tom Spence on December 12, 2003 at 20:44:15:
I LIVE IN A 2 STORY HOUSE WITH HOT WATER HEAT, WITH OLD STYLE CAST IRON RADITORS AND MY SYSTEM IS BUILDING ABOUT 20 - 22 POUNDS OF PRESSURE. TO MY UNDERSTANDING THE MAX PRESSURE OF THESE SYSTEMS SHOULD BE AROUND 17 LBS. I HAVE DRAINED THE ENTIRE EXPANSION TANK (OLD NON-BLADDER TYPE) AND PRESSURE DROPS TO AROUND 15 LBS. THE PRESSURE THEN REBUILD OVER THE NEXT DAY OR SO. I SEEM TO HAVE SOME AIR IN THE SYSTEM AS WELL AND BELIVE THAT MAYBE CAUSING MY PROBLEM. I'VE BEEN TOLD THAT THE AIR SHOULD BE ABLE TO BE BLEED OUT OF THE HIGHEST POINT OF MY SYSTEM. HOWEVER I'M ONLY ABLE TO BLED IN OUT OF A LOWER POINT ON THE FIST FLOOR (1 RADITOR IN PARTICULAR). IS THE AIR THE PROBLEM? ALSO WILL THE CIRCULATING PUMP PUSH THE AIR AROUND MAKING IT DIFFICULT TO BLEED OUT? tHE ONLY PLACE TO BLED IS ON THE INDIVIDUAL RADITORS.

i WOULD GREATLY APPRECIATE ANY ASSISTANCE YOU MAYBE ABLE TO PROVIDE. I'M A DO-IT YOUR SELFER AND LIKE TO UNDERSTAND THESE THINGS.

THANKS AGAIN,
TOM


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