Stanhvac1...here's an update. Replaced the Hoffman #79. (little sucker wasn't cheap, $90) also replaced boiler drain and repacked a secondary shut-off drain while boiler was down. I learned "on this site" the B & G, FB #38 pressure relief valve has an adjustment! I had no idea! The reason I mention this is when I fired up the boiler, the #79 began purgeing air immediately (moisture spot developed at end of copper relief line). She burbed and moaned a bit but eventually settledown. Noticed pressure was getting close to the 30 PSI level. Watched it for the next couple of days and noticed, at rest and cool, pressure was hoovering around 14 to 15 PSI. After loosening the top nut on the #38 and inserting a flathead driver into the screw and turning it "counter-clockwise" was able (by releasing water through boiler drain) to adjust the pressure to around 10.5 PSI. I can say at full call (3 zones opened) she hoovers around 24/26 PSi with a temp of 190/210. Very rarely does the Amtrol expansion tank get warm. I can actually say the boiler hasn't run this good in at least 15/18 years. This site is THE best for home owners who have a general understanding of heating systems and take a safe approach to addressing real concerns! Again, thanks for the advice and the help! Bring on the Winter! BTW...this boiler is the "original"... house was built in 1964. ..yep, 50 next year. Looking at new boilers....kind of scary...not sure if its a case of bad installs or just poorly built units but a lot of really upset end users. Hope I can keep this one going...keeping fingers crossed.