The John Guest Acetal Plug Stopper Fitting provides a reliable end-point closure for push-fit water lines in residential and commercial installations. Manufactured in the UK from food-grade acetal copolymer with nitrile O-rings, this grey fitting delivers superior strength and heat resistance for potable water, CO2, and pneumatic applications.
SPECIFICATIONS
Technical Details
| Manufacturer | John Guest Speedfit |
| Material | Acetal copolymer with food-grade nitrile O-ring |
| Color | Grey |
| Function | End plug stopper for terminating fitting connections |
| Connection Type | Push-fit collet with grip and seal arrangement |
| Suitable Applications | Potable water, foodstuff, air, inert gases, CO2, pneumatics, vacuum |
| Temperature Resistance | Enhanced heat resistance vs. polypropylene |
| Origin | Designed, manufactured, and assembled in the UK |
INSTALLATION & USE
How to Install
- Ensure the pipe end is cut square and free of debris or burrs
- Push the plug fitting fully onto the pipe until it seats firmly against the collet
- Tug gently on the pipe to confirm the collet has engaged and the connection is secure
- To remove, unlock the nut, push the collet toward the fitting body, and pull the pipe free
COMPATIBILITY
Compatible Systems
This John Guest acetal plug stopper is compatible with all John Guest Speedfit push-fit tubing systems and can be used to terminate connections on reverse osmosis systems, water filtration lines, refrigerator ice makers, CO2 dispensing systems, and pneumatic air lines. The food-grade construction makes it suitable for direct contact with potable water and beverages.
🔧 Pro tip: When terminating an unused port on a manifold or filter housing, ensure the pipe stub is long enough to fully engage the collet teeth. A minimum insertion depth prevents accidental disconnection under pressure.
