The 15 mm John Guest Locking Collar improves connection security in push fit systems by locking tubing into place. It suits mobile or high vibration setups such as caravans, marine vessels, portable units, and caravan plumbing fittings where extra retention is needed.
The collar clips behind the collet of compatible 15 mm John Guest fittings to help prevent unintentional disconnection. It is quick to fit, easy to remove, and well suited to long term installations where safety and stability matter.
Caravan and marine water systems
Refrigeration and beverage lines
Portable and modular plumbing systems
Any system with movement or mechanical vibration
Locks 15 mm tubing into John Guest push fit fittings
Helps prevent accidental tube release
Simple clip on design
Compatible with all 15 mm John Guest connectors
Made from durable acetal plastic
John Guest fittings have a long record of reliable use in plumbing and water systems. The 15 mm locking collar adds extra security so your setup stays connected even when exposed to continual movement or vibration.