Return pipes fighting

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I've never been told that this is the right way to do it but it just seems to make sense. What is everyone else's view on this?

When running central heating return pipework, we always try to configure the tees into the returns so as to not have 2 returns coming from opposing directions.

Ie: we always try to use the centre and one end of the tee to return into and not use each end of the tee ending up with 2 opposing forces and using the centre as the return.

Hope this makes sense, anyone have any thoughts or are we doing this unnecessarily?
 
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Can't see it matters as long as they are all commoned before returning to the boiler. You have negative pressure (suction) on the return to the boiler and positive pressure (blowsion :D ) going into the tees.
 
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Yes, I guess that is one other factor to consider. I just wanted to know if anyone else does it.
 
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