Midland Industries 10133 Ball Check Connector Brass

Product Description

The MIDLAND INDUSTRIES 10133 is a brass ball check connector designed to allow flow in one direction while preventing backflow in the opposite direction. It features a 3/8-inch SAE 45-degree male flared inlet on one end and a 1/4-inch male NPTF connection on the other. Built from brass, this connector is rated for temperatures from -65 to 250 degrees F and measures 1.35 inches in length. Plumbers, HVAC technicians, and refrigeration service pros install this fitting in fuel, refrigerant, and gas line assemblies where backflow prevention at the connection point is required.

The 10133 is suited for use in residential and light commercial applications involving SAE 45-degree flare systems. Common installation scenarios include refrigeration line sets, LP and natural gas appliance connections, and pneumatic or hydraulic circuits where a compact inline check valve at a threaded-to-flare transition is needed. Its male NPTF thread provides a dry-seal connection that resists leakage without relying solely on thread sealant.

Key Features

• SAE 45-degree male flared inlet (3/8-inch) for leak-resistant flare connections
• 1/4-inch male NPTF dry-seal thread on outlet end
• Brass construction for corrosion resistance and durability in fuel, gas, and refrigerant service
• Wide operating temperature range: -65 to 250 degrees F
• Compact body: 1.35 inches long, 0.65 inches wide, 0.6 inches tall
• Ball check mechanism prevents backflow without an external valve

Compatibility

Designed as an OEM-style replacement or new-installation fitting for SAE 45-degree flare systems requiring a 3/8-inch male flared to 1/4-inch male NPTF transition with integrated backflow prevention.

Installation Notes

Installation is typically performed by a licensed plumber, HVAC technician, or refrigeration mechanic. Shut off and depressurize the line before making or breaking any flare or threaded connection. Apply thread sealant or PTFE tape to the NPTF threads as appropriate for the service fluid, and use a backup wrench on the fitting body to avoid twisting the line. Verify flow direction before tightening; the ball check allows flow in one direction only.