1/2" Bulkhead fitting Thread X Thread

Bulkheads are used to attach plumbing to aquariums and sumps to create a leak free way to move water.   Bulkheads come in different sizes and different ways to connect plumbing.  you can choose from: Slip x Slip - both the inside and outside of the bulkhead will require a solvent to permanently bond the plumbing to the pipe.  Thread x Thread - both the inside and outside will use a male NPT threaded fitting  Slip x Thread - The part of the bulkhead on the inside of the tank uses a slip fitting (requires solvent) and the outside requires a male NPT fitting  Thread x Slip - The part of the bulkhead on the inside of the tank uses a threaded fitting (for make NPT fittings) and the outside of the tank is a slip fitting (requires solvent)  Our 1/2" bulkhead uses our 30MM Diamond bit