GM Tech wrote:Who cares about how long they are...just "suck in" the refrigerant in your hoses after you charge your car... do this by shutting off high side at high side port, then open both valves and let low side suck in all liquid in the hose...they teach this in "a/c 101- basic refrigerant class"
GM Tech wrote:You mean you don't have check valves on the end of your R-12 hoses? This was mandatory when the new refrigerant laws came into being. I highly recommend them, no wasting of refrigerant, no purging of hoses needed, they hold vacuum when unhooked from car etc... sure are nice to use...and they open up when tightened down on your r-12 ports on car...
cornbinder89 wrote:I can't remember where I got them, but I have little short extensions on my hoses that have a 1/4 turn ball type shut off. turn the valve and draw off the high pressure, then turn the valve on the low side. When you remove, some gas is trapped, but it keeps the air out.
Tom Greenleaf wrote:I like second ones better as well.
If $53 USD is an obstacle A/C work involving refrigerant isn't for you. Send things out to a pro A/C shop if you don't wish to buy/own the equipment.
You do realize just a simple air conditioning check up with pressures without any repair could easily cost over $100 bucks or does where I live,
The adaptors now over 20 years ago for just GM high side and a smaller for Ford high side ports cost me over $50 for just those 1 inch small items by Snap-On
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