The Coast RV John Guest 12mm Push-Fit Straight Connector is a reliable, tool-free coupling for joining two runs of 12mm OD water tubing in caravan and motorhome plumbing systems. John Guest's globally trusted push-fit technology uses an internal stainless steel grab ring and EPDM O-ring to create an instant, leak-proof connection with a single push — there are no clamps to tighten, no solvents to apply, and no curing time required. Perfect for repairs, extensions, and new plumbing builds in caravans and campervans.

Suitable for all standard 12mm OD semi-rigid PE and PVC tube used in Australian RV water systems, these couplings are fully releasable using the push-and-release collar — a key advantage when modifications or fault-finding are required. As the fitting choice of Australian and New Zealand caravan manufacturers for decades, John Guest fittings are a reliable, long-service solution for any on-board water system.