When we close a store and shut the racks down we use a coil of 3/8 copper 20-25 ft flare it and run the coil in ice hook one end to rack another to a reclaim tank. Works great.
Damn I had a helper that did that one time I told him where to cut the pipe then left, he called and I went up saw where he cut it and then I blew a gasket, friggin morons