[falcontrek4]

I have 2 PEX lines under my kitchen sink. This sink is on an island.
I want to run RO filtered water to my fridge, but I'm not sure if the bottom pipe in the picture goes under the floor to supply the fridge or not. Is there any way to trace where these pipes go? I thought about putting food coloring in at the sink supply valve to see if it comes out of the fridge door water.

 

[dhal22]

I would hire a plumber. Oh wait, I'm already a plumber. This site is for plumbers only and we don't give away our skills. Assuming you don't either...................

 

[Logtec]

No escutcheons at the wall but one in the middle of the pipe, who did the plumbing?

 

[sparky]

Ummmm could beee

 

[dhal22]

Where do they go?

 

[chonkie]

I have 2 PEX lines under my kitchen sink. This sink is on an island.
I want to run RO filtered water to my fridge, but I'm not sure if the bottom pipe in the picture goes under the floor to supply the fridge or not. Is there any way to trace where these pipes go? I thought about putting food coloring in at the sink supply valve to see if it comes out of the fridge door water.

Just shut off the valve going to the sink, that'll shut off the water to that whole line. Then cut the line you suspect going to the fridge, then just blow into it and see if you get air at the fridge.