Material: This fitting is made of Brass,with threads that are manufactured to the highest quality standards.
Size: NPT 3/4" Female,G 1/2" Male. G Thread can fit BSP, NPS and G Thread.
G Thread also known as BSPP (British Straight Parallel Pipe) will not seal with NPT (US standard Pipe) and requires this adapter to between the two.
G (BSPP) thread is a straight parallel thread that requires a Seal
This Joytube brass fitting can convert G thread connector to NPT connector.