“The hose barb will tightly fit 6mm ID silicone tubing. I adjusted mine using a portafilter pressure gauge. For those who dont have a portafilter gauge, I found that about 2.5 threads exposed (measures 0.160 inches) gives about 10 bar of pressure; and 4 threads exposed (measures 0.200 inches). I believe I set mine at 10 bar. I plumbed mine into a Tee right after the pump, which recirculates back into the pump inlet.”
