Welcome! Here are the website rules, as well as some tips for using this forum.
If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
Gifford loop and slow returns
Can slow returns cause pipe banging with a Gifford loop on a wet return? I have a one pipe steam system that has been running ok for the last 2 years and now is getting a little fussy. It's starts about 10min into the cycle with both mains closed and the pressure starts to fluctuate 1-2kpa with a slight fluctuation in the water line. Touching the leg of the return to the Gifford loop (8-10" below), I can feel it get real hot then cool. So I'm guess steam is getting past the loop and the water level is fluctuating there too.
I'm also noticing the B&J vent on one of the mains is burping a bit, which maybe part of the cause of the pressure fluctuation. Dang steam system... always needing so much attention. Any help would be greatly appreciated.