I found both a plastic and chromed brass T that I believe were those same dimensions. I used it to plumb a sump pump from the icebox on our Islander to the drain hose from the galley sink which went out through a seacock. I found the pieces in the plumbing department at Lowes, the application was supposed to be for plumbing a drain for a garbage disposal under the kitchen sink. I believe it was called a "tailpipe", not a "T". I used the plastic one so it wouldn't corrode, trimmed it to length and used 6 SS hose clamps.