To replace the spout, first remove the old tub black matte bathroom faucet. To do this, you need a large pipe wrench. To turn it counter-clockwise, secure the wrench over the spout and rotate it counterclockwise to remove it. Make sure that the new spout has the same length as the old one. Measure from the wall to the end of the nipple to determine the exact size of the new spout. TELESCOPING spouts should be at least 1-3/8" in diameter.