Home Graco 104266 Air Regulator - 1/2 NPT Graco 104266 Air Regulator - 1/2 NPT by Graco Inc. Graco 104266 Air Regulator - 1/2 NPT Click to expand Tap to zoom $102.99 Call 800-294-1605 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Provides precision control of outlet air pressure. Feedback principle provides constant pressure to pump regardless of air demand rate and fluctuations in supply pressure. Additional fittings required (except air regulators with installation kits).