These have a camlock head for quick release and cleaning of the strainer and also have a longer strainer for improved flow. These are commonly used on sewage trucks or other high transfer applications. The 2" NPT size has a 3" camlock dust cap and a 8" long full flow 316 stainless screen. The 3" NPT size has a 4" camlock dust cap and a 316 stainless screen that is 13-1/2" long. Both have EPDM gaskets and the 2" is rated for 100psi at 20°C (70°F) while the 3"is 75psi at 20°C (70°F). Also available in Aluminum (suffix AL).