Expansion tank question

[Leon82]

I have a bell and gosset pottable water expansion tank in my recirculating loop. I also have a rusco hotwater stainless mesh filter and it has done its job catching the annode particles from the minitank.

It is also catching rust from the expansion tank. The circulator is a taco stainless so the tank is the only source, which I have confirmed by removing it.

I would guess this may be normal but zilmet makes a stainless tank. Do you think it is worthwhile to replace it with a stainless?

 

[hj]

Bell & gosset is a heating company, so I doubt they make a "potable water" expansion tank, and if they did it would be "glass lined" or at least galvanized so it would NOT rust. Heating tanks are black steel so they DO rust. REplace the tank with a proper one.

 

[Sponsor]

 

[Leon82]

OK, ill order one up.
I just double checked it and it does say potable water on it. I'm going to guess that the nipple on the end was plain steel

 

[Leon82]

It looks like some are plastic lined with a stainless nipple also.

the zilmet is all stainless with a food grade diaphragm and the cost is not as much as a would have thought