MustardDimension

I wanted it to go to the centre tank on the upper stage rather than the lower, and I\'v worked it all out now anyway, attached the fuel lines to the top decoupler

My ship design for mun landings consists of 4 external tanks and a centre tank for the landing stage, but I added fuel lines so the centre tanks stay full but it then drains the external tanks during the launch stage > At the moment I am using an RCS tank to stop the flow, but in the interest of weight I want to remove that tank, so is there any other way? Cheers all