What's this?

[Sanford]

Upgraded bathroom faucets this week. In the process, found additional piping under the sink. See attached pic. Anyone know what this is?

[16ACE27]

Pic is too dark to see anything other than the pipes and a "flow" direction to the white pipe.

Also, which coach?

[Sanford]

Yeah, I know. Not a lot of room to maneuver. 2016 Challenger 37kt.

[mcars302]

Almost looks like a vacuum breaker.

[camperguy99]

I vote for vacuum breaker too. White pipe appears to be the fresh water line coming in. Could be for the tank "buzz" cleaner too? Needs a breaker so your tank isn't sucked back into the city line.

[16ACE27]

Originally Posted by camperguy99

I vote for vacuum breaker too. White pipe appears to be the fresh water line coming in. Could be for the tank "buzz" cleaner too? Needs a breaker so your tank isn't sucked back into the city line.

Nope, flow indicator is "to" the white pipe.

[Travelin' Texans]

Vacuum breaker to the black tank flush system.

[penguin]

Red hot
Blue cold
White vent

[ctpres]

Originally Posted by Travelin' Texans

Vacuum breaker to the black tank flush system.

Yup that's it. When you disconnect flush hose - a lot of clear/fresh water should come out.

[Sanford]

Thanks to all for the replies.