Review on AM BRAND Threaded Bulkhead Pack by Paul Williams

I have several aquariums and have used different brands of baffles. These are by far the worst partitions I've come across. The external thread does not align with the seam of the injection mold. The internal thread does not seal. On all 4 bulkheads I could not seal a standard NPT PVC fitting without leaking with teflon tape or teflon pipe paste. When trying to screw an NPT fitting deep enough to get a good seal, the very brittle plastic on these bulkheads broke. I threw away all 4 and will never buy an "AM" faucet again. Save yourself the headache and pay a little more for one of the big brand bulkheads.