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The PARKER A4FA7-MG is a push-to-connect faucet adapter tube fitting designed for quick, tool-free tube connections in plumbing and water supply applications. Built from polyoxymethylene (POM), a rigid engineering thermoplastic known for chemical resistance and low moisture absorption, this fitting accepts 1/4 inch OD tubing and transitions to a 7/16-24 UNS-2B threaded port. It is rated to 300 psi, making it suitable for typical residential and light commercial water line pressures. Plumbers and water treatment technicians will find this adapter useful wherever a push-in tube connection must terminate at a threaded faucet or fixture port.
This fitting is commonly used in under-sink water filtration systems, reverse osmosis installations, ice maker supply lines, and faucet connections where 1/4 inch OD tubing runs to a 7/16-24 threaded port. Its tan POM construction resists the chlorinated and slightly acidic water conditions typical in potable water systems. The push-to-connect mechanism allows fast field assembly without compression sleeves, ferrules, or thread tape on the tube side, reducing installation time during fixture rough-in or equipment changeout.
Designed as an OEM-style push-to-connect faucet adapter for systems using 1/4 inch OD tubing with a 7/16-24 UNS-2B threaded connection port, typical in residential water filtration and reverse osmosis installations.
Installation is performed by plumbers or water treatment technicians. Shut off the water supply and relieve line pressure before disconnecting existing fittings or inserting tubing. Ensure tubing is cut square and deburred before inserting into the push-to-connect port to achieve a proper seal. Verify thread engagement on the 7/16-24 port is hand-tight before applying final torque with an appropriate wrench; do not overtighten POM fittings.
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