2nd Gray Water Tank

[cowgirl326]

We have a 2021 Momentum 381M. It has two gray tanks. Does anyone know how to use the second one? We know how to fill and flush the first one, just not the second one. Thanks!

[Jkwilson]

Your rear tank has the hookup and connection behind the axles. It is a combined black and gray tank that serves the half bath.

[Cate&Rob]

cowgirl326

Welcome to our owners technical forum. When you have a chance, have a look at our welcome post. https://gdrvowners.com/forum/main-fo...to-new-members . This will help you set up your signature and navigate the forum.

Further to the advice from Jkwilson John, the drawings show that since both the rear toilet and sink drain into the rear tank, it is considered a "black" tank rather than a "grey" tank and should have a separate flush attachment as well as a separate dump connection.

Rob