Tube Mandrel - 1/2" nozzle to 1/2" tube ID - John Guest

The John Guest tube stem adapter offers a dependable and precise connection between tubing and pipe systems in water filtration and reverse osmosis setups. Designed for strength and durability, this fitting ensures a secure, leak-free connection that performs reliably over time. Its high-quality plastic construction provides easy handling and long-lasting use for both professional and home installations.

With its accurate dimensions, the stem adapter fits seamlessly between a 1/2" hose stem and a 1/2" tube (ID). It’s the perfect replacement part or system upgrade for anyone who values quality and reliability in their water filtration equipment.

Whether you’re replacing a worn connector or assembling a new RO system, this John Guest fitting delivers the performance and convenience you expect from a trusted brand. Quick to install and built to last, it ensures a clean, secure connection for your water filter setup.

Customer Benefits at a Glance:

• Fits 1/2" stem to 1/2" tube (ID)
• Perfect for water filters, RO systems, and spare parts
• Simple, tool-free installation
• Genuine John Guest quality and reliability
• Leak-proof, secure connection
• Food-grade plastic for pure water applications

The product range is not suitable for compressed air, explosive gases, petroleum or other liquids as well as in heating systems or similar areas of application.