CIS has the best selection of Schedule 80 Bulkhead Fittings, like this 6" PVC Tank Adapter with Viton gasket. Ends are slip x fipt. Call today for a quote. We ship direct to you anywhere in the US. , Size: 6" , Material: PVC, Gasket: Viton, End Type: Socket x Fipt, Max Pressure: 150 psi