Posted by Ben, From: on November 28, 1999 at 14:55:08:

In Reply to: hot water radiators posted by Bill Sholl on November 27, 1999 at 14:13:36:

: I have a hot water heating system that was updated to a high efficiency system with a circulating pump. The radiator on the third floor is not getting water. The piping that goes to the third floor is a direct connection from the main pipe not more than five feet from the boiler. Any idea's?

I had a simular problem that was caused by a combination of Air, system pressure and monoflo tees. Have you gotten All the air out of the system? Is the pressure somewhere between 8 and 12 psi? Where there zone valves put in during the upgrade? Here are a few things to look at first.

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