I bought 2 hot+cold hydrants and 2 V2+hydrants from Aquor, and 3 out of 4 of those worked perfectly but one of the V2's would drip constantly after disconnecting the hose connector. Customer service responded quickly and walked me through some troubleshooting steps to try and dislodge potential debris that might not be allowing the operating rod to close all the way, and after that didn't work, quickly shipped me a warranty unit at no cost. We were under construction, and getting a replacement unit immediately was important, and it arrived within days. Once we removed the "defective" unit, we see that it isn't defective at all but the plumber didn't follow the instructions, and used teflon tape which gummed up the mechanism!
5 stars for Aquor, 10 stars even
1 star for the plumber my GC hired
And my (very constructive) feedback: Aquor should put a large label on the hydrant itself, in both English and (more importantly) in Spanish, stuck to the hydrant in a way that hopefully forces someone to remove and read it before install, reminding them to not use teflon tape and that the o-ring built into the hydrant is sufficient to stop leaks, because nobody will read the manual. And I guess, never trust your contractor and watch everything they do, or... just do it yourself!