What is this?

[Jeff Eastman]

...........

[Jerry Peck]

What is this electrical device connected to the plumbing line

Probably either a solenoid controlled shut off valve or a circulating pump, I'm inclined to go with solenoid controlled shut off valve as it does not look like any circulating pumps I've seen.

[Jeff Eastman]

hey thanks! so is the configuration okay?

[Jerry Peck]

hey thanks! so is the configuration okay?

Not including anything else, but if you cannot get to the other side of it - NO!

[Billy Stephens]

Jeff,

Looks OK to me.

It either cuts off water flow or boost water pressure.

WHOOPS!!!

[Peter Plein]

That is a Honeywell motor actuated valve, usually used as a zone valve for hot water heat. The only ones I have ever seen are 24 volts.

[Jerry McCarthy]

Jeff
If that gypsum partition covering is the fire protection between the units it needs fire taping/sealing. Also, how does one access that electrical J-box?