April 2013:
The old boiler finally gave up. I replaced it with a Weil McLain P-WTGO-3
This was January 2012:
I have a pretty significant water drip from a leak between boiler cast sections. I anticipate replacing the furnace but want to try to buy some time by stopping the leak. Without intervening, the leak will certainly get worse and worse until it ultimately no longer holds water pressure. Note: This article is NOT for you if your pressure gauge reads 30psi and/or if water is dripping from the pressure relief valve tube. In your case, you need to call a certified tech, now.
This stuff is awesome!
Turn up thermostats to start circulator. Shut off the cold water supply line to auto-feed at the Fill-Trol tank.
Mixed one quart of Silver King SAFE boiler stop leak with two gallons of tap water in a pail. Injected the solution into the boiler though the boiler drain tap with a small electric pump. The pump was initially unable to overcome the 12psi in the system, so I bled off some water in the baseboard line. Now the little pump made up the difference with the 2 gallons of solution and got me back to about 12psi. Put everything back to normal operating position. 24 hours later, NO LEAK! awesome. Kept the pressure close to 12psi throughout procedure and never let the boiler cool to less than 160 degrees. (cooling is your enemy here. cooling=contraction… and more leaking)
