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Clanky Trap, why?

guzzinerd
guzzinerd Member Posts: 149
edited March 17 in Strictly Steam
So i finally received the last three trap rebuild kits for the Sarco T25 s.  I opened the first up only to find out that I'll need new taller lids as well.

After putting the original assembly back together it started this clanking at 5am.  Unfortunately the unit is occupied with an Airbnb customer so i removed the diaphragm while the new tops are made and shipped to me.

My questions are:

- why did it start clanging after removing and putting it back in?

- is there something else i could have done other than remove the diaphragm to get rid of the clanking? (It was quiet before opening it)

Thanks

Video:
https://youtube.com/shorts/91R658JnmDI?feature=share


Steam noob.  Bryant 245-8 in a 1930s 6-unit 1-story apt building in the NM mountains.  26 radiators heating up 3800sqf.