3/4" NPT HEAVY DUTY Industrial Grade Filter Regulator Coalescing Desiccant Dryer System For Compressed Air Lines, Metal Bowls, Great For Paint Spray And Plasma Cutter (AUTO DRAIN) - Amazon.com
Wilkerson - Compressed Air Regulator: 3/4″ NPT, 300 Max psi, Standard - 16650145 - MSC Industrial Supply