Picked up some 1.5" bulkheads from Texas Tropical for my 75 gallon. I couldn't find any T-fittings to fit the threads at Home Depot so I went to a plumbing supply store and he said the threads different from standard plumbing threads and to check a pool plumbing supply company. Apparently the thread sizes are different on pool plumbing parts. Anyone know where I could find some of these t-fittings? 1.5" on the inside, the OD is 2".