Trouble is a small system on a waeco fridge needs to have a test point cut in ,a car air con service are plug in ,isotherm do a remote condenser unit which has a reusable plug in coupling, i made an old fridge into new fridge one one of my boats,with this system, (still going strong), i know how to do it just getting hold of a fridge engineer who can be bothered with a small job, i used to do fridge work, but on an industrial scale, oh bring back r22!!