FYI, if you need to replace a valve on a pipe that you don't have a practical shut off, one can of R134 poured into the pipe inside a short piece of pipe installation will freeze a 1/2 or 3/4" pipe solid for about half an hour so you can remove a part of the pipe down stream to repair or replace a valve.
Beware; no warning when it thaws it goes from zero to 100% in less than a second!
I put my oven thermometer inside the frozen cuff to monitor the temp to make sure it was frozen and have some warning.
I made a jig for R134a delivery from a needle type shop air blast valve. (plastic handle one of course). Then I can use $5 can of R134a not the $20-30 can that comes in the pipe freeze kit.
I find it humorous that the world is all freaked out about DIY venting their R134a but the "canned air" and pipe freeze kits use the identical chemical.
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2011 E70 • N55 (me)
2012 E70 • N63 (wife)
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