The aquacomputer res most likely does NOT use 1/4" NTP. I'll wager it is BSP; a non tapered thread that has a slightly different tpi (thread per inch) than NTP and relies on an o-ring at the end to seal. Having said that, 1/4" NPT fittings with 3/8" barbs thread into the BSP reasonably well while the 1/4" NPT x 1/2" barbs barbs do NOT. I haven't ever tried the Plug N cool barbs on a BSP block...one minute and I will
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Getting paid like a biker with the best crank...
-MF DOOM
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