John Guest connectors for boating, boats, yachts and marinas

John Guest connectors for boating, boats, yachts, sailing boats, pleasure craft, marina service pedestals and dock bollards, selected for repairing, extending or installing fresh water circuits on board. In this collection you’ll find push-fit quick-connect fittings, elbows, straight connectors, tees, threaded adapters, reducers, valves, check valves, clips, inserts, tubing and useful accessories for pumps, taps, showers, tanks, filters, water heaters, watermakers and dockside water supply points.

Install Beer is an official John Guest distributor in Spain. We work with original connectors, fittings, tubing and accessories for applications involving water, beverages, dispensing, water treatment, compressed air and technical systems. In the marine sector, this makes it possible to choose each part more accurately according to the tube outside diameter, thread type, pressure, temperature, compatibility and the real installation conditions in confined spaces, damp areas or systems subject to vibration.

The most common sizes in fresh water installations for boats and yachts are usually 15 mm outside diameter for sanitary lines and 22 mm for main runs or higher-flow sections. On imported vessels you may also find sizes in inches such as 3/8" OD or 1/2" OD, as well as BSP, NPT or NPS threads. Before purchasing, we recommend always measuring the tubing on the outside and checking the equipment thread, since confusing 15 mm with 1/2" can cause leaks or incompatibilities.