A straight fitting that connects a 3/8″ MNPT threaded port to 1/4″ OD quick-connect tubing. Cross-size adapter for inline filters with 3/8″ ports that need 1/4″ tubing. Sold as a 2-pack.

What it does

This straight adapter connects a 3/8″ MNPT threaded port to 1/4″ OD tubing in a straight line. Common on inline filters with 3/8″ threaded ports that need to connect to standard 1/4″ RO tubing.

The straight version of the 3/8″ × 1/4″ elbow — same cross-size adaptation, without the 90° turn.

Key benefits

• ✓3/8″ MNPT × 1/4″ QC — cross-size thread-to-tube
• ✓Straight design — direct connection, no angle
• ✓PTFE tape on threads; push-fit tube side
• ✓2-pack with quantity discounts
• ✓Common for inline filters with 3/8″ ports
• ✓Durable, food-grade construction

Specifications

Compatibility

Often used with

Good to know before you buy

• Wrap PTFE tape on threaded end.
• Push 1/4″ tubing fully in.
• Check for leaks.