Grey tanks

[Nevada]

We have a 2017 Montana highcountry toy hauler with 2 grey tanks both having valves and drain lines. My question is do I need 2 hoses with a"y" connection when We hook up at full service rv parks?

Thanxs

[CrazyCain]

My Hideout has 2 dump valves, one for the gray and one for the Black. I use a "Y" to connect them.. WOrks great..

:popcorn: