The valve you are asking about is actually bronze. It still needs to be lead free. I used this instead but I'm only running cold sap through it.
http://www.mcmaster.com/#5741k25/=10y9har
2010 - barrel stove & a steam table pan. 10 - 12 trees
2011 - same deal as the year before. My son is now hooked along with me.
2012 - Took over the garden shed and set up a Mason 2x3. Hoping to tap 30 - 50 trees. Ended up with 100 taps out.
Finished the season with 16 gallons made
2013- - Purchased a Smokey Lake 2 x 3 Hybrid pan. WOW, what a difference!!