12mm John Guest Fittings

John Guest 12mm fittings give you a tool-free push-fit connection for caravan, RV, marine and low-pressure commercial water lines. We stock the complete 12 mm range: connectors, BSP adaptors, shut off valves, plugs, inserts, locking clips and pipe saddles, plus blue, red and black tube cut by the metre.

Sizes 12 mm tubeCaravan and RV water systemsMarine plumbing and tanksDrinking water and beverage linesWater pump and filter connectionsPortable building fit-outsLow-pressure air and water lines
12mm John Guest Fittings

10 products

About 12mm John Guest Fittings

Our 12mm John Guest fittings range provides a fast, secure push-fit solution for caravan, marine, and low-pressure commercial plumbing systems. Built for ease of use and long-term reliability, these fittings are trusted by professionals for water, beverage, and air lines.

This collection includes all major 12mm John Guest components—from connectors and adaptors to shut off valves, plugs, and accessories. Each product is engineered from high-grade acetal plastic or brass for a strong, corrosion-resistant seal. Installation is quick, requiring no tools, making these fittings ideal for upgrades or fast repairs in the field.

At Hose Suppliers Australia, we stock the complete 12mm range for fast dispatch from our Brisbane warehouse.

Please Note: John Guest can sometimes have supply shortages on certain products, which may result in backorders. Our staff will contact you directly regarding any shortages that may affect your order.

Trade accounts

30-day terms and volume pricing for trades

Open a trade account for tiered pricing across the range, net-30 payment terms at checkout and a dedicated account manager.

Apply for a trade accountCall us (07) 3890 3359