Description
The John Guest 3/8" x 3/8" Stem Elbow is a high-quality 90-degree push-fit connector designed to create secure right-angle connections in potable water, reverse osmosis (RO), beverage dispensing, and water filtration systems. Featuring a 3/8" stem connection on one end and a 3/8" push-fit connection on the other, this fitting allows for quick installation without the need for tools, clamps, or adhesives.
Manufactured from durable, food-grade acetal copolymer with EPDM O-ring seals, the John Guest Stem Elbow delivers reliable, leak-free performance and is trusted by water treatment professionals worldwide.
Key Features
- 90° Elbow Design: Creates clean right-angle tubing connections in tight spaces.
- 3/8" Stem x 3/8" Push-Fit Connection: Fits standard 3/8" OD tubing and compatible push-fit ports.
- Push-Fit Technology: Installs quickly without tools, glue, or crimping.
- Food-Grade Construction: Manufactured from durable acetal copolymer approved for potable water applications.
- Leak-Free Seal: High-quality EPDM O-rings provide dependable sealing.
- Reusable Design: Tubing can be disconnected and reused with the release collet.
- Corrosion Resistant: Suitable for long-term use in drinking water systems.
Compatibility
The John Guest 3/8" Stem Elbow is compatible with:
- Reverse osmosis systems
- Under-sink drinking water systems
- Water filtration systems
- Ice maker water lines
- Refrigerator water lines
- Coffee and espresso equipment
- Beverage dispensing systems
- Water coolers
Compatible with:
- 3/8" OD polyethylene tubing
- 3/8" OD LLDPE tubing
- 3/8" push-fit ports
- John Guest and other compatible push-fit systems
Specifications
Product Type – Stem Elbow Push-Fit Fitting
Connection 1 – 3/8" Stem
Connection 2 – 3/8" Push-Fit
Angle – 90°
Body Material – Food-Grade Acetal Copolymer
Seal Material – EPDM O-Rings
Application – Potable Water & Water Filtration
Installation – Tool-Free Push-Fit
Applications
The John Guest 3/8" x 3/8" Stem Elbow is ideal for:
- Reverse osmosis installations
- Water filtration systems
- Refrigerator water connections
- Ice maker plumbing
- Beverage dispensing equipment
- Coffee machines
- Drinking water systems
- Tight installation areas requiring a 90° connection
Its compact design helps reduce stress on tubing while providing a neat and professional installation.
Maintenance
For optimal performance:
- Ensure tubing is cut square and free from burrs before installation.
- Push tubing fully into the fitting until it reaches the internal stop.
- Inspect fittings periodically for leaks or signs of wear.
- Replace the fitting if damaged or if sealing performance is compromised.
- Use only with tubing compatible with John Guest push-fit fittings.
💡 John Guest push-fit fittings are designed for repeated use, allowing tubing to be disconnected and reinstalled without damaging the fitting when the release collet is used correctly.
Why Choose John Guest Push-Fit Fittings?
John Guest fittings are trusted by plumbing and water treatment professionals for their:
- Fast, tool-free installation
- Reliable leak-free connections
- Durable, corrosion-resistant construction
- Compatibility with a wide range of water filtration and reverse osmosis systems
- Long service life with minimal maintenance

Reviews
There are no reviews yet.