Odd valve setup for kitchen faucet - two valves for cold side

[Pink Jazz]

We just purchased a U by Moen Arbor smart faucet, and we plan to install it soon. However, on my pre-inspection, I noticed an oddity in my setup - there are two valves on the cold side, with the two valves daisy-chained to each other. Is there any reason for this? Note that we have a tankless water heater; I wonder if this has anything to do with it.

 

[Reach4]

Two valves in series could be because it was easier than just replacing the failing valve.

 

[Sponsor]

 

[Pink Jazz]

I also wonder if the builder was trying to limit the water pressure.

BTW our current faucet is a Delta Leland.

 

[Reach4]

I also wonder if the builder was trying to limit the water pressure.

Seems very improbable. How about a small photo?

 

[Pink Jazz]

Here are my cold valves attached. The current Delta faucet is attached to the one on the left. The hot is the one on the far left.

 

[Jadnashua]

Maybe they had/have a dishwasher or possibly a water filter.

 

[Reach4]

Ice maker/water dispenser in the fridge?

 

[Pink Jazz]

Ice maker/water dispenser in the fridge?

We do have an ice maker in our fridge. I would have presumed the shutoff valve for that would be behind the fridge. I'm guessing the flow on the right valve is outward.

 

[Jadnashua]

SHut it off and check the frig...easy, quick.

 

[Jeff H Young]

ive plumbed like that befor . Its a loop for a future filter to feed the frige and ice maker