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Old 14-04-2015, 11:28 PM   #5717
kimsim
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Join Date: Nov 2008
Posts: 1,690
Makes sense. I also feel topup gas every 2yrs is not quite right.
Qns seeking advice (Thanks!):
1. Should I do a leak test & rectify? How much does a leak test cost?
2. Is leak test also done at FCU end?
2. I had reused small sections of R22 copper piping as these were concealed, could this contribute to the leak?
IF wanna fully solve were trim all FCU copper pipes and solder all on 4 units, follow by trim outdoor all gas pipes and flared again with bubble test then just no problem at all

Cause R22 is lower pressure also unknown the existing copper was what gauge, if lower than G23 should be same as your case.
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