12mm John Guest Plug

The 12mm John Guest Plug is a quick and effective solution for securely sealing unused outlets or tube ends in push-fit systems. Designed for use with 12mm John Guest fittings and tubing, this plug installs in seconds and provides a reliable watertight seal.

Made from durable acetal, it offers excellent resistance to scale, corrosion, and pressure in non-permanent or temporary system setups. Ideal for caravan, marine, and commercial applications where system flexibility is essential.

Key Applications

• Sealing off unused lines in caravan or marine plumbing

• Temporary shut-off during maintenance

• Beverage dispensing and low-pressure water systems

• End-of-line blocking for expansion systems

Product Features

• Simple push-fit design—no tools required

• Compatible with 12mm John Guest fittings and tubing

• Engineered from high-grade acetal for long-lasting use

• Provides a secure seal for low-pressure systems

Why Choose John Guest Fittings?

John Guest fittings are trusted in commercial, marine, and mobile water systems for their ease of use and long-term performance. The 12mm plug is a practical accessory for system protection, upgrade prep, or future expansion.