Changing fixed dump valve to flexible cable controlled valve

Are your valves themselves OK? I ask because I remember seeing where Valterra had kits that fastened OVER ordinary valves and made them remote. That seems to be what our 2003 Jayco has. I think I can replace "valve only" and re-use the remote extensions. I remember reading something to the effect of "use with Bladex Valves." I don't know if every Valterra valve is a "Bladex."