First time poster here. I've been looking at many of these posts on whether or not to use brass in my Mash Tun (which I have already built). I came across this information while researching:
http://standards.nsf.org/apps/group_public/download.php/1668/RFP 4191.pdf
I bought my parts at HomeDepot. Here is the description on the brass fittings:
* Easy Quarter-Turn Operation
* Meets NSF approved Low Lead Standards
* Regulates Water Flow in the Line From a Trickle to Wide Open
* Larger Flow Rates Than Stop Valves
* Fitting Name : Valve
* MFG Model # : 107-404HC
* MFG Part # : 107-404HC
It does state that they are using the NFS approved low lead standards.
Hope this helps. Made me feel a little better. The only thing that worried me was the following paragraph taken from that document:
"Non-leaded brasses can contain a variety of metals that may be released into finished drinking water including bismuth, selenium, copper, tin, zinc, nickel, antimony, and lead. These new brass alloys often contain higher levels of these metals to obtain the desired properties achieved by lead in the traditional brass alloys. While there are currently no US drinking water regulations for bismuth and tin, the elements of selenium, lead, copper, nickel, and zinc are all known to cause negative health consequences and therefore have Maximum Contaminant Level Goals (MCLGs) and Maximum Contaminant Levels (MCLs) as regulated by the USEPA. The potential of non-leaded brasses to leach metals into potable water has not been examined adequately. More research needs to be done in order to gain a better understanding of the leaching propensity of these alloys."