Mild Steel for Domestic Hot Water
Mild Steel for Domestic Hot Water
(OP)
We are to specify a centrifugal separator on the recirculation line on the domestic hot water system in a large building. This will take out large particulates in the water. Are there regulations against using a mild steel vessel on domestic water? The manufacturer makes one of stainless steel but the price is much greater.





RE: Mild Steel for Domestic Hot Water
Hydrae
RE: Mild Steel for Domestic Hot Water
Galvanized steel is an approved material for water service pipe and water distribution pipe. Code doesn't say anything about using steel.
http://www.legis.state.il.us/commission/jcar/admincode/...
If you are going to specify this item, you probably should specify one that will be fabricated from stainless. Can't imagine that it could be that expensive.
Not sure that a centrifugal separator will be that effective for your application. You would probably be better off with a wound filter or if you are just interested in large particles, a strainer.
RE: Mild Steel for Domestic Hot Water
2. Where are the particles comming from?
a)outside of the system? I would filtrate the make up water.
b)inside?
Rgs
RE: Mild Steel for Domestic Hot Water
RE: Mild Steel for Domestic Hot Water
I suggest you check with your plumbing inspector, some jurisdictions use a tight interperation on materials acceptable for use in plumbing. Stainless steel is a wonderful product, but I have run into inspectors who require that NSF cert. And for a fabricated product, an approved internal coating (NSF epoxy) on carbon steel was the only way I could comply.
Hydrae
RE: Mild Steel for Domestic Hot Water
Don't forget too that all that debris
is supporting a nice population
of Legionella bacteria, unless of course
you are maintaining a minimum of 60 Deg C.
cheers,