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Posted by Ken on November 22, 2007 at 21:22:26:
I have a 2 pipe steam system in a old Victorian house in Virginia. Believed to have been installed in a 1922 renovation to the house. The condensate is returning very slowly to the boiler causing the low water sensor to cut off the burner and then to call for water at about 45 minutes of run time. Radiators begin to heat at 15 minutes after start up. After the stat turns off it takes several hours before all the condensate returns. Then the boiler floods and I have to drain it each time. There are three mains and three returns. The cut in is set at 1/2 and cut out at 2 psi. I suspect that the wet returns are probably clogged up, a check valve in the wet return just before the near piping has failed and that I believe is an F&T trap has also failed. It is a Webster Modulation Vent Trap (1TM1 on the body and 1TM2 on side cover.) It also has an air vent fitted to the top - Hoffman #1A radiator vent. No other vents on the main returns. What F&T trap should replace that old Webster?