They leak like others have said, these are a loose fit, even when tightly secured with cable zip ties leak, with very low 2 ft, less than 1psi of gravity pressure water. I was using them on a Clear Vinyl Tubing Flexible PVC Tubing, Hybrid PVC Hose, Lightweight Plastic Tubing, 1/2 Inch ID. Got another brand that has three barbs, no leeks.
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