ApolloPRESS 10075860 8733 Press Union, 1/2 in, C, Brass Leak before press technology Compatible with Pro-Press pressing tools, approved for underground installation (per local installation code), use with hard/soft ASTM B88 K, L and M copper tube, UNS C27451 brass body, EPDM O-ring, ANSI/NSF-61 listed lubrication silicone, hot water up to 250 deg F, chilled water down to 33 deg F, and lead free construction.