water tank

Gday
Think about the thousands of families that were brought up with only tank water.Almost every country town and farm had gal tanks when I was young.

There is nothing wrong with galvanised but it does corrode eventually. Stainless is the ultimate in storage of food and beverages. It is completely inert and will last forever and a day. If cost isn't an issue then stainless is excellent. Might be a little heavier is the only negative for stainless I can think of.

In an off road application I would go a poly tank, seen too many stainless tanks fatigue where welded and crack.

Poly tanks have no seams or weak points.

Galv tanks are soldered.

well never put anything but rain water in it !!bore water and chlorinated water will destroy it in no time !!

In the OKA I have 2 DIY plastic water tanks, 2 commercially made water tanks and one commercially made stainless steel water tank.
I have had constant stress cracking of the stainless one and ZERO problems with all the others.

Cheers,
Peter
OKA196 Motorhome.

Is the tank 'off the shelf' or custom made ??
If custom- why not fiberglass- there are potable water resins available for just that purpose.

I didn't mention poly because the original question was specifically about stainless vs galv. I agree though - a good quality plastic tank is light, strong, fully inert, and immune to fatigue. Hard to beat.

Trev&Ness,

Galv has Zinc in it and is good for the prostrate so they say.

Lead well I am still fine seeing I work in a lead and zinc mine. Before anyone goes off we are monitored all the time.

Stainless workers that do boats will build a tank that won't crack.

As said any water that has minerals in it can kill the galv tank. Our galv raw water tanks lasted about 10 years before they collapsed. That water has heaps of salts in it and has to be placed through a RO plant before you can drink it.

A galv tank in general use will last for years.