The commercial recovery machines have a valving arrangement such that the recovery compressor can pump down all of it's own lines and then switch to recovery mode. If you want to be really legit and re-use your refrigerant, you might want to put one of these filter-dryers on at the input of your recovery rig. I'm not so sure that all the condenser junk is really necessary, if you chill the receiver. I guess with digital scales getting as cheap as they are, going by weight would be a better way do do it. I also had to remove the little ball from the bottom of the torch assembly, so the gas could flow into the bottle.
Pipe Prop is in the news with national publications and magazines throughout the United States for its Unistrut Adjustable Pipe Support System, which makes it the only pipe support system on the market that includes a Miami-Dade County Notice of Acceptance and is used in the high wind hurricane zone areas of Florida. When building owners and contractors require their rooftop pipe support system for electrical conduit, condensate drain lines and other piping to stand the test of time, they depend on Pipe Prop.
The Pipe Prop rooftop pipe support system has been the perfect solution for HVAC contractors, electricians and roofing contractors as well as building owners and managers. Since 1972, Pipe Prop inventor Jim Brown worked as an HVAC contractor in the Fort Worth, TX area. As you can imagine, not only was this method ineffective and impractical for varying weather conditions, it was also time consuming and labor intensive. Seeing a great need in the HVAC industry, Jim Brown invented the Pipe Prop, an adjustable system that elevates and secures a variety of pipe to the roof—anything from slender copper pipes to larger PVC pipes. Once you have your Pipe Prop in hand, follow these easy-to-follow instructions to complete your customized, secure model for dependable pipe support.
Pipe Prop’s versatility and flexible design allows it to be used in a variety of ways by industry professionals nationwide. Field data shows just how well the Pipe Prop performs in various challenging conditions including high winds, heat, and harsh weather.

Pipe Prop Adjustable Pipe System is manufactured in Richland Hills, a suburb of Fort Worth, TX.
Photo of manufactured coaxial condenser Xgrs show smaller tube exiting larger tube perpendicular to coil. It seems that one of the big obstacles that prevent people from attempting refrigeration hacking is not having a refrigeration recovery machine.
So I was greatly pleased to come across a thread that showed how one person had built a home made recovery machine.
And separately, here is an archived page with instructions on building a refrigerant storage tank. NOTE: all this because I found a manual refrigerant recovery device called the Spooter II, there's even an Operation Manual for the thing.
That's a shame too, because it's really not so terribly difficult, nor expensive and to my way of thinking, it holds tremendous promise for those with the gumption to hack.
I found some interesting work that other people are doing with re-purposing air conditioners and mucking about with HVAC.
The first two videos are of a heat pump water heater that was put together by some guy named 'tesla500', who seems to have some experience with electrical designs.
BTW, a manifold gauge like he's using can be gotten for pretty cheap, like here, for instance. A friend of mine charged the system in his 67 Chrysler Imperial (dual piston compressor) with propane.
You will love the way this works, and won't believe the other ways you can use this mixture! Since you already have a vacuum pump, you can use it (your vacuum pump) to connect to the shrader valve and pump down the recovery machine's lines. You might try posing as a wealthy Yacht owner, tell them you need a Spooter II to repair your refrigerator on your Motor Yacht that is moored in Mexico.

I have been able to find films that are not allowed to be sold in the USA this way (nope, not porno).
I achieved the same result only better by using a spare propane torch, cutting off the torch head and brazing on a shrader valve in it's place. From bitter cold to unbearable heat, extreme weather conditions can take a toll on the structural integrity of your pipe support. During this time, he became all too familiar with the unstable, makeshift contraptions some people would use to prop up draining pipes on commercial roofs.
These crude, homemade props were simply not stable or durable enough to withstand even the tamest of thunderstorms.
Additionally, the Pipe Prop pipe support system has been thoroughly tested to withstand some of the most extreme weather conditions from Florida to California. It worked but 'stretcharoni' didn't go the next step and hack into the refrig system and put in a refrigerant to water heat exchanger and a small pump. Using 4-by-4s, landscape timber, brick, wood blocks, and any other scrap material available, he saw contractors cobble together an apparatus that would hold up the pipe—for a short period of time. Personally, I put my reservoir in my deep freeze for a half hour before I start, and hook a refrigerant line (copper with flared fittings is the cheapest) to it and leave it in the freezer until the process is completed.
You don't want the reservoir to get more than half full, because over-pressure can result when you take it out of the freezer.

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