1/2 in. Black Malleable Iron FPT x FPT Coupling Fitting

A:  Hello, couplings that include a reverse thread are called 'Left-Right' Couplings; this reverse thread will allow you to couple pipes and nipples in a pre-existing plumbing line. We hope this helps with your project.

A:  This is a standard coupler. When a pipe is inserted from either end it will turn clock-wise to tighten. The coupler you're describing would be a specialty item - not something typically seen off-the-shelf and will clearly state "left & right threads."

A:  Not sure what you mean. It's used to connect 2 shorter lengths of pipe together to get 1 longer length. At each end you would turn the pipe to the right to tighten it.

A:  Hi shan, this is not a Left-Right coupling, as if it was the product title would call it out as either, 'Left-Right' or 'LR'. We hope this helps with your project.

A:  Hi Donny, for that question we recommend checking either local plumbing code or a local welder for guidance on your project need. There's too much we don't know about your specific project and therefore cannot give you firm recommendations above & beyond how this is designed to connect.

A:  Hi Ron, the O.D. of this coupling is 1.2-in. We hope this helps with your purchase.