[TheForge] A challenge to Harry

[paul]

Jerry Frost wrote:
> Good point Andy. I don't know if the modern bladder pressure tanks are 
> galvy but it makes sense they would be.
>
> I don't recommend anyone expose themselves to zinc smoke unnecessarily 
> but it isn't the danger it's reputation claims. There are also safe 
> ways to remove the galvy like a vinegar soak.
>
> Still, galvy's another point in favor of something else for a forge 
> shell.
snip:

While it is possible that there are galvanized bladder tanks, I have 
never seen one. One reason for the switch to bladder style tanks was the 
ban on lead content in galvanizing that took place around the mid 80's 
or so. Once the lead content was gone the galvanized water storage tanks 
failed much more often than the ones with the older lead bearing 
coatings. The bladder tanks eliminate the water to  metal contact, 
solving the corrosion problem, with the added benefit of eliminating the 
absorption of air by the water, and therefore eliminating the need for 
anything to control the air
level or the periodic addition of air... sometimes by hand pumping... 
not to popular.
BTW if you have a bladder style tank, and the pump is short cycling, 
it's likely that the bladder is shot.

Paul