I pruchased this bulkhead, and it turns out it is too big. Does anyone know where I can find one that has threading like this one on the inside, but is smaller on the outside. I need it to be an inch or less not 1 and 1/8. The 1/2 threading is what I need the other 1 and 1/8 is too big. https://www.saltwateraquarium.com/schedule-40-bulkhead-1-2-thread-x-thread-black-hole-size-1-1-8/