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.

See John Guest collection Dedicated John Guest page John Guest marine guide
Skip to go to results list
Product type
Category
Brand
Price
to
The highest price is 4.97€
Clear
Availability
6 items

Filter

Product type
Category
Brand
Price
to
The highest price is 4.97€
Availability

Common questions about product categories
How do I know if this product is compatible with my system?

It depends on the type of connector/coupler, thread sizes, tube diameter, and use (beer/gas). If you send us your setup or a photo, we’ll confirm it for you.
What information should I check before buying?

Keg/connector type, threads, inner/outer tube diameter, fitting type, and working pressure/temperature.
Is it suitable for both craft and industrial beer?

Yes. The key is to correctly adjust pressure/temperature and maintain proper cleaning.
Can I use it for drinks other than beer?

In many cases yes (wine, vermouth, and others), but it’s best to confirm materials and pressure/cleaning requirements depending on the beverage.
Is it easy to install or do I need tools?

Many components are easy to install, but for professional setups we recommend a clean cut on the tubing, proper tightening, and leak testing.
What should I do if there are gas or beer leaks after installing it?

It’s usually caused by incorrect measurements, a worn gasket, or insufficient sealing. We’ll help you detect it and choose the right gasket/fitting.
Why am I getting too much foam?

Usually due to high temperature, incorrect pressure settings, an unbalanced line, air entering the system, or insufficient cleaning.
What pressure should I use to serve properly?

It varies depending on style, temperature, and line length/diameter. We’ll guide you to balance your system and achieve a stable pour.
How often should I clean the lines?

It depends on consumption, but regular cleaning prevents off-flavors/odors, foam issues, and breakdowns, and reduces waste.
Do you offer technical support as well as selling equipment?

Yes. We’ll advise you to ensure compatibility, correct installation, and proper pressure/temperature settings. We also have a technical service for diagnostics, maintenance, and system optimization.
How long does shipping take and how is the cost calculated?

The timeframe depends on the destination and order size. The cost is calculated automatically at checkout based on weight/dimensions and address. If you need urgent delivery or a bulky order, we’ll help you choose the best option.
Can I return a product if it’s not the right one or I don’t need it?

Yes. We accept returns within the specified period, as long as the product is unused, in perfect condition, and in its original packaging. To request a return, contact us with your order number and the reason.
What should I do if the product arrives damaged or something is missing from my order?

Write to us as soon as possible with photos of the packaging and the item. We’ll review the case and arrange a replacement, reshipment, or the most suitable solution.
Can I buy just one unit or is there a minimum order?

Yes, you can buy single units for most products. If any item requires a pack or has a minimum quantity, it will be clearly indicated on the product page.
Do you ship internationally outside Spain?

Yes. We ship throughout Europe and also to North, Central, and South America. Shipping cost and delivery time are calculated by destination at checkout; if you need an urgent option or a bulky shipment, get in touch and we’ll advise you.