Aluminum 3" Female BSP to 3" Male NPT Pick One Side_2 inch Beveled rubber stopper completely shuts

Beveled rubber stopper completely shuts off water flow from sprinkler head orifice

and valve is opened

Carbon Steel 6" Flange x 5" Male NH

and will not seal properly if used in conjunction with it

Aluminum 3" Female BSP to 3" Male NPT Pick One Side_2 inch Beveled rubber stopper completely shutsBritish Standard Pipe (BSP) can be most commonly found in Canada, UK, Europe, Asia and Australia. It is a finer thread than National Pipe Thread (NPT), and will not seal properly if used in conjunction with it. Two types of threads are used: British Standard Pipe Taper (BSPT) and British Standard Pipe Parallel (BSPP). British Standard Pipe Taper uses a tapered thread system, and sealant is provided to help secure the male and female connection.