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OD Tube Fittings

(5/32 — 1/2 in.) John Guest has a robust selection of inch- and metric-sized push-fit tube fittings for applications ranging from food quality and vending to pneumatics and agriculture.

Reverse Osmosis (RO) Fittings and Tube Connectors and More

Our push-fit tube fittings are designed for use with a wide range of water treatment applications, including water purification, reverse osmosis (RO), ice makers, beverage dispensing, vending & OCS, car washing systems, marine/RV and many more. 

To meet the demands of the market, these OD tube fittings feature food-grade materials and a range of both inches and metric sizes for optimal versatility. So, whether you need a quick and easy way to make connections for your products or fittings to handle your installation/service needs, John Guest RO fittings and tube connectors have the flexibility to easily integrate into your systems.

Explore our OD tube fittings for water treatment, water purification, reverse osmosis (RO) and more below to find the size and solution that works for you.