3/8" x 1/2" Quick Disconnect Coupler

General Pump D1005 Quick Disconnect Coupler EPDM O-Ring 

• 3/8" MPT x 1/2" MPT
• 4000 Max PSI
• Max Temperature 175°F
• Brass

Make your 1/2" outlet reduced to 3/8" with a coupler. We use these often on our hose reel adapater.