3/4" lead free brass barb insert x 3/4" female pipe thread adapter, for connecting 3/4" cross link polyethylene pex tubing to 3/4" male iron pipe thread pipe end or fitting, secure barb ends of fittings to pex pipe with tv #608-826 cinch clamps & tv #608-743 cinch tool, or copper crimp rings & crimp tool, immediately testable to well over 100 psi, meets the new nsf/ansi standard 14-2009 & astm f 1807-9si standard for products intended for the transport of potable water, ansi/nsf standard 61 annex g for lead free compliance & the wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight to meet ab1953 California & vt s152 Vermont low lead restrictions.