Lightweight, high-strength glass-reinforced Marelon(TM) composite seacocks don't corrode, and are highly resistant to UV degradation and abrasion. NPS parallel threads can be sealed with PTFE tape or even plumber's putty. These seacocks can also be fitted to mate with bronze fittings. Marelon is UV stabilized and will not deteriorate in sunlight. Base 3" Model MF849 1/2 Height 3" Ports 1/2"