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Originally Posted by Cathar
Since the pump doesn't ship with barbs the performance is always going to be subject to whatever barbs the end-user fits. Not all barbs are created equal with some 1/2" OD barbs I've seen having an ID about the same as a 3/8" OD barb.
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That is right. I suggested C-Systems to offer plastic fittings (Delrin) at both thread (G1/4 and 1/4 NPT) as well 1/2 and 3/8 barbs.
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Originally Posted by Cathar
G1/4 is incidentally the same as 1/4" BSP, well at least for me 1/4" BSP threaded male barbs fit just fine.
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I know that you know that G1/4 has 19 threads/inch with pitch 1.337mm while 1/4NPT has 18 threads/inch with pitch 1.412mm.
So i will ask you to be careful with this.
If it fitted fine thanks to Delrin female thread.
BTW follows mechanical difference for others users who has not these specs.
British Pipe Thread ( Whitworth Form) -- Parallel (BSPP/BSPF)
(important spec.) G 1/4 Parallel Thread - Nominal Size = 1/4" - 19 Threads per inch
Others specs.: Major Diameter d=D 13.157 mm --- Minor Diameter Male Thd. - d3 = 11.445 mm --- Tap Drill Diameter = 11.6 mm --- Included Thread Angle = 55 deg --- Pitch - p = 1.337 mm
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NPT Tapered Pipe Threads
(important spec.) Tapered Threads - Nominal Size 1/4" NPT - 18 Threads per inch
Others specs.: Taper Angle = 1 deg 47' --- Pipe O.D = 0.540" = 13.716 mm --- --- Included Thread Angle = 60 deg --- Pitch - p = 0.0556" = 1.412 mm