hi all,

hoping someone can enlighten me on something that bugs me.

I work in the netherlands in the supermarket refrigeration industry, when we install the piping for a branch from the main piping we install the liquid line coming out of the bottom from the main piping, a t-junction pointing downwards. Can anyone give me a good explanation why?

most of my colleagues come out with a half baked explanation or none at all and there is no mention of this practice in any of the books I have read and it is not something I learnt during my study.

I have also seen in some supermarkets in England that the liquid line is just the same as the suction and is installed coming out of the top on the piping at a t-junction (for oil return in suction).