Transfer Flow are metal and Titan are a poly material in their replacement tanks. Titan are bigger for close to the same price. Google transfer flow and go to their list of installers.
Titan has several dealers in Mcallen.
titan dealersI like the extra gallons of the Titan but I don't want it to hang below my skid plate. Have to do more research.
Good luck.
Aux. is different than replacement so make sure you know what you are looking for.
You can avoid reality, but you cannot avoid the consequences of avoiding reality โ Ayn Rand
