This house is 4 blocks away from mine. Boiler is hammering and over feeding. We checked the LWCO and feeder. Works fine. 3 mains piped bull headed, equalizer is a mess. We cleaned the pigtail and turned the pressure Down from 3 psi to the min of 1psi. Fed with a 1/2” gas connector. Be surprised it it can reach full firing rate. Flu liner has a big hole in it so we didn’t fire it.
Sorry for the crappy pics. Not much room or light. Flu liner has a Big hole in it so we didn’t even fire it.
The two outer mains are parallel flow 2” and tie together to a single dry return. Then there is a 3rd counterflow main that’s just a home run to two radiators only, with it’s own dry return. Unusual. The counterflow seems pitched a little shallow, but gets away with it because it probably has only 100 EDR on it. Just a single Hoffman 4A low capacity main vent. Counterflow main strangely has a large Relief Valve on it. It spews water apparently as well.
Boiler, a WM EG-75, it appears about 10-12 years old so it’s been a train wreck I suspect ever since.
Not sure if we will even quote fixing it. Would need probably 3-4 days to fix it and I’d have to do most of the work so service calls would back up. I might quote installing a pair of Big Mouth Vents and a Gorton 1 on the end of the counterflow main. Probably one of only 10 or fewer steam system left in our town. I’d be tempted to fix it just to save it, even if we don’t really make any money on it.