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low loss fittings sllow schrader removal for evacuation
and vacuum proceedures. i recommend c&d ball valve brass
units. they are money well spent and would be an asset in your tool bag. kennedy ...

when ready to disconnect turn off the ball valve on thr liquid line low loss fitting this isolates the high pressure.open both
manifold valves. this draws the higher pressure into the low pressure...

if you need a refresher on the proceedure let me know kennedy

if you need a refresher on the proceedure let me know
kennedy

using low loss fittings will stop the problem, thats what they are for-kennedy

marky mark,
I don't know why everyone is so negative. my hvac instructor says there are no problems just oppurtunities.
that's what you are faced with here. nobody said that it
had to be done...

if you are using a gauge manifold set with hoses don't
overlook the possibility that it might be your test hoses
or manifold set that has developed a slight leak. I had
that happen to me while I...

putting a flame on a pressurized copper tube is
something you will NOT attempt a second time. the
copper WILL rupture like a balloon. don't even
think about it.