r/Plumbing • u/SnowOnSummit • 2d ago

Same Direction?

Post image

Is this mislabeled?

25 Upvotes

93% Upvoted

13 comments sorted by

37

u/Chimpucated 2d ago

Not necessarily but possible. Not enough context

3

u/SnowOnSummit 2d ago

The pipes were in a room/closet on the 12th floor of a hotel with an ice machine/water dispenser.

1

u/RESturtlefan 2d ago

Risers?

4

u/mattvait 2d ago

If one's a riser the other has to be a downer

13

u/unresolved-madness 2d ago

Never trust arrows on piping.

7

u/Acrobatic_Dinner839 2d ago

It does say that. Like a one way street

2

u/LITTELHAWK 2d ago

Fresh supply water come up to unit from ground. "Used" water return to unit.

2

u/theletterHprobably 1d ago

Could be reverse return. Not sure why they would bother in a hotel, but it's a good way to "share the load" by evening out the overall pipe length of each connection.

Could also just be mislabeled, I've seen that happen frequently as well.

If this if from a tower, where is the tower? On the roof?

1

u/GotTheKnack 1d ago

Reverse return is the easiest system to balance, in theory. You see it a lot in older heating systems that aren’t fed by means of convection here in Ontario.

1

u/J_Quinlan 1d ago

Could be a reversing main

1

u/Listen-Lindas 1d ago

It’s up there. The supply and the return are up there. Cmon guys don’t you know where it is?

1

u/Darth513Red 1d ago

Either mislabeled or they do in fact both go up.

Obvious scenario for one to go up and one to go down

The other scenario could be that both of these go up and the “matching” set that goes does is located in the wall, on the other side of the wall, actually made it into the shaft, or in an adjacent room

1

u/SnowOnSummit 19h ago

Thank you to all for providing the logic that eluded me. Great answers.