I can only hypothesize Pauldenton... I saw that flow rates were lower immediately after plumbing the TDX w/ nozzles than they were the next evening when I'd test. When I disassembled the block, I noticed that the neoprene on the insert had compressed (as expected) and was hard. At some point I believe the nozzles are letting some water past w/o going through channels. My bet is JoeC tested Cu tdx flow resistance after nozzle insert had "sprung a leak" as it were while on the Ag TDX this hadn't happened at the time of testing.
Only Joe knows for sure though. I DO know that his options are: something funky (like my suggestion or something lodged in the block) w/ the wb or something funky with his test setup. Blocks are otherwise identical.
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