3/4 BSPP Wear-Resisting Three Way Brass Ball Valve Green Connection It is wear-resisting Excellent anti-rust anti-fouling properties Can be connected to each other two pipes, can not maintain the third pipe of mutual communication, only from the distribution role. Note: BSPP 3/4 is thread size, the pipe inner diameter is approx 25mm. Please refer to the British Standard Pipe thread sizes before you buy.