A straight quick-connect fitting that joins a 1/4″ MNPT threaded port to standard 1/4″ OD RO tubing — built-in O-ring seal, no Teflon tape, tool-free push-to-connect. Sold as a 2-pack.

What it does

This straight fitting connects a water filter, RO system, or inline component with a 1/4″ MNPT (male-threaded) port to standard 1/4″ OD tubing. The threaded side hand-tightens into the port; the quick-connect side accepts push-to-connect tubing — no tools, no tape.

The straight inline design carries the tube run straight through the fitting, ideal for direct connections where the tubing continues in the same direction. The built-in O-ring seals the threaded side, so you get a leak-free connection without PTFE (Teflon) tape.

Key benefits

• ✓1/4″ MNPT × 1/4″ OD quick-connect — the standard RO tubing size
• ✓Straight inline design — direct pass-through for tube runs continuing in the same direction
• ✓Push-to-connect — tool-free; push the tube in until seated, press the collet to release
• ✓Integrated O-ring on the threaded side — no Teflon tape needed
• ✓Works with countertop RO, under-sink RO, inline filters, ice makers & fridges
• ✓Sold as a convenient 2-pack

Specifications

Compatibility

Often used with

Good to know before you buy

• Hand-tighten the threaded (MNPT) side only. Do not use a wrench — over-torquing cracks the plastic and defeats the O-ring seal. No PTFE (Teflon) tape is needed thanks to the built-in O-ring.
• Push the tubing fully into the quick-connect port until it seats. A firm push past the initial resistance locks it in. Give the tube a gentle tug to confirm it’s held.
• To remove tubing: press and hold the collet ring flat against the fitting, then pull the tube straight out.
• Make sure your tubing is genuine 1/4″ OD — 3/8″ tubing will not fit this fitting.
• Rated for cold water only — residential drinking-water systems, not hot-water or high-pressure lines.