Yes it not good, the flared tube is Daikins idea for retaining a strainer, not the greatest idea for field service, however the brazing is very unexceptable so much heat - so you can just imagine the scale on the inside of the pipework - a longer term killer. The local trade schools have a lot answer for. I have no idea why they persisted when clearly the job had gone to the dogs before they got ot end, they should have asked for help. Unfortunety it reminds me of another tech different service industry - people used call em "$ex fingers" until oneday I finally understood that every thing the tech touched was ...... you get the idea!