Best tank materials

[Strait Shooter]

Originally Posted by Cheechako

Half inch aluminum? wow!

no no, my bad..... typing faster than I should be allowed to, and no proof reading.

1/4"

The original OP did say price was no object, so is that Titanium then?

[Stumble]

Having just replaced my 8 year old aluminium fuel tank because of pin holes. The more I think about it, the less sure I am that it wouldn't have been worth going with titanium at any cost. The new tank was about $800, the work to get the old one out, and the new one in was ~$10,000.

[LakeSuperior]

Back to monel tanks...it is a high end/expensive alloy used for marine fuel and water tanks as it is extremely corrosion/acid resistant. It is used in the chemical and aerospace business. It is a copper/nickel alloy that I think would also work well for blackwater storage. The gas tank in my 37 foot 30 year old yawl is monel. I had SST water tanks that had to be replaced at 13 years.

[RainDog]

I am probably about to convert my holding tank to a second diesel tank. It is a somewhat odd size, but not too crazy. Sounds like the general advice here would be for me to use an off the shelf polyethylene tank?

Current holding tank is an integral GRP tank. Would cut that out to make room for the new tank.