Review on PIONEER Air Conditioner Ductless Charging by Raymond Iglesias

After spending a few hours trying to figure out why I couldn't maintain a vacuum on my Pioneer Mini Split system, I started insulating the parts. The end came finally to this adapter. Apparently I broke the o-ring and this is a very unique seal that I have not been able to find a replacement for. I wish Pioneer would have included extra spacers with the purchase as they are so fragile. I ended up buying another adapter at a local store where I was skeptical but it worked. I know the failure was most likely due to overtightening of the connection, but all other parts of the vacuum circuit were not affected by the same force.