The John Guest male connector uses a collet-and-seal arrangement that grips tubing when you push it in and seals with a food-grade nitrile O-ring. Thread the male NPT end into your valve, faucet, or appliance port, push your tube into the opposite end, and you're done. To remove: unlock the nut, push the collet toward the body, and pull the tube free. Acetal copolymer delivers superior strength and heat resistance compared to polypropylene, making it suitable for potable water, beverages, air lines, CO2 systems, pneumatics, and vacuum.

A common mistake is assuming a 1/4" NPT thread measures 1/4" on a ruler. It does not. NPT threads measure larger than their nominal size. Match your NPT port size to the chart above.

Use John Guest acetal male connectors on reverse osmosis systems, under-sink filters, ice makers, beverage dispensers, espresso machines, refrigerator water lines, CO2 tanks for kegging and carbonation, pneumatic air lines, vacuum systems, and any application requiring a clean, leak-free connection between tubing and threaded ports. Compatible with John Guest tubing and most other push-fit tube standards. Not for use with petroleum-based fluids or aggressive solvents.