Water hammer - novice question

ethicalpaul

https://forum.heatinghelp.com/discussion/comment/1890000#Comment_1890000

yes I don’t believe steam travels into the equalizer. In a long call for heat the pipe can get hot through conduction of course.

If it does, it should also travel down the drip.

But it’s not important

Captain Who

https://forum.heatinghelp.com/discussion/comment/1890032#Comment_1890032

Oh it's important. There is absolutely no temperature gradient in the whole length of that equalizer nor significant temp. difference from the takeoff, signifying it is filled with steam. Then at the Hartford Loop where the waterline is and below you see a sharp discontinuity and significantly lower temperature. Here's another experiment you can do with two pots of nearly boiling water or heck, slowly boiling water. You can use 2 in. pipe nipples and elbows. 😃

ethicalpaul

it only signifies the temperature of the pipe. You don’t know if there’s steam in there.

stevesorenson

https://forum.heatinghelp.com/discussion/comment/1888367#Comment_1888367

FYI, couple of weeks after rearranging the pipes to make a close nipple and with the gift of more cold weather, we're continuing without water hammer. The close nipple is a few inches below the nominal water line and the sight glass level varies above and below the nipple height. There are a lot of things with this piping arrangement which are not installed per the Dunkirk manual, but I figure if I'm getting heat when I need it with no side effects I'm happy.