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Discussion Starter · #1 ·
Summer is around the corner. I haven't work yet on R410a system. I have Testo 550. I want to buy set of hoses with a ball valve, Core removal access. What else do I need for R410a system?

-Does the service valves for R-410A systems have 5/16" access port?
-Does the R410a refrigerant cylinder have 5/16" access or 1/4" access?

Thanks yall
JJ
 

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Their 1/4 inch, unless your working on a mini split, then their 5/16". The R410A cylinders are all 1/4". Just remember, the cylinder is on a 25 pound cylinder, not 30 like R22.
 
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