1/2″ brass barb x 3/4″ fpt, lead free, pex adapter, for use with pex tubing & connected with stainless steel cinch clamps & cinch tool true value# 608-743, astm f-876, astm f-877 to sdr-9 dimensional standards, nsf 14 & 61 for use in potable water systems, csa b137.5 standards, nsf cl-r certified for use in hot water systems where chlorinated 140 degree Fahrenheit hot water can be constantly re-circulated, the wetted surface of this product contacted by consumable water contains less than 1/4 of 1 percent, 0.25%, of lead by weight, meets ab1953 California & vt s152 Vermont low lead restrictions.