Connect your 12mm John Guest tubing to standard 1/2" hose effortlessly with this genuine John Guest push-to-connect barb adapter – essential for caravan, camper trailer, RV, and motorhome freshwater plumbing systems.
This high-quality fitting allows quick, tool-free transition from 12mm semi-rigid pipe to flexible 1/2" hose (secured with a hose clamp – not included). Perfect for linking to tanks, pumps, taps, or existing hose runs.
Key Features:
· Genuine John Guest – Made in the UK for reliable, leak-free performance
· Push-fit on 12mm side – Simply insert tubing until it locks (no tools needed)
· 1/2" barbed outlet – Suits standard 1/2" ID hose with clamp
· Durable nickel-plated brass construction – Corrosion-resistant and food-grade safe
· Suitable for cold and hot potable water systems
· 1-year warranty
Specifications:
· Model: NC990
· Brand: John Guest
· Barcode: 665626100673
· Weight: 50 grams
· Dimensions: 5cm x 2cm x 2cm
Ideal for new installs, repairs, or upgrades in caravans, motorhomes, boats, and off-grid water setups.
Trade enquiries welcome. For bulk packs or matching John Guest tubing/fittings, call (07) 4662 5424.
Make plumbing fast and secure with the John Guest 12mm to 1/2" Barb Adapter – genuine quality you can trust!


