ive got leak finding soap, just a little less viscose then dish soap. Anyway the problem was i wasn't thinking about the one plate hx joint at the bottom. There are two brazed joints at that bottom outlet with the piping scheduled down, so i tested the one exposed braze and forgot about the other inside the insulation.I was worried a pressure switch or something was leaking.

thnx for the compliment! im confused by the rest of your comment lol