Straight reducing connector - 3/8“ tube OD to 1/4“ tube OD - John Guest

The PP series for imperial tube dimensions is made from white polypropylen (PP) plastic and is equipped with food-safe EPDM O-rings.The product range was developed for drinking water applications, water treatment systems etc.Properties:     for drinking water applications and water treatment systems     Polypropylene (PP)     mountable without tools     fast, repeated disconnection possible     very good flow propertiesThe product range is not suitable for compressed air, explosive gases, petroleum or other liquids as well as in heating systems or similar areas of application.

The John Guest Straight Connector 3/8" (PP0412W) provides a reliable and durable connection for a wide range of water filtration and reverse osmosis systems. Its user-friendly push-fit design ensures a secure and leak-free joint between two 3/8" OD tubes – no tools required.Engineered for quick installation and easy maintenance, this connector delivers consistent water flow and quality in residential, commercial, or laboratory settings. Made from high-grade, food-safe plastic, it’s perfectly suited for drinking water systems where hygiene and reliability are essential.John Guest stands for top performance and precision. This fitting resists pressure, temperature variations, and corrosion. Ideal as a replacement part or for expanding existing water filtration setups. A trusted component used globally in professional water treatment.Key Benefits:Compatible with 3/8" OD tubingEasy push-fit installation – no tools neededMade from durable, food-grade materialPerfect for water filters, RO systems, and drinking water applicationsReusable and easy to cleanReliable, watertight connectionThe product range is not suitable for compressed air, explosive gases, petroleum or other liquids as well as in heating systems or similar areas of application.

The John Guest Straight Reducer Connector 15 mm to 3/8" delivers reliable performance and outstanding build quality. Designed for secure and leak-free connections between different tube sizes, it ensures a steady water flow — perfect for water filters, reverse osmosis systems, and various liquid applications.Featuring the proven push-fit technology, this connector installs effortlessly without tools and can be easily released when needed. Its strong, food-grade construction guarantees durability, pressure resistance, and consistent functionality for both home and professional use.Whether replacing old fittings or upgrading a water filtration system, the NC2511 straight reducer connector provides lasting quality and efficiency. Keep your water system running smoothly and hygienically with this premium spare part.Customer Benefits:Secure connection between 15 mm and 3/8" tubingQuick, tool-free installation with push-fit designPerfect for water filters, RO systems, and drinking water setupsFood-grade, durable construction for long-term reliabilityEasy maintenance and reusable multiple timesThe connectors are also ideal for air, non-flammable gases (e.g. N2 and CO2) and vacuum applications.

The John Guest Straight Reducer Connector CM201512W ensures a secure and leak-free connection between two tubes with different outer diameters of 15 mm and 12 mm. This high-quality push-fit fitting allows for a quick and reliable installation, commonly used in water filtration systems, reverse osmosis units and other drinking water applications.The durable plastic body is made from food-grade material, ensuring maximum hygiene and long-lasting performance. The connector is easy to install and remove without tools, offering a flexible solution for maintenance, upgrades or repairs in any water system.Whether used at home, in laboratories or in the catering industry, the John Guest reducer connector stands out with precise engineering, excellent sealing performance and proven durability. It’s the ideal spare part for anyone who values quality and reliability.Customer Benefits at a Glance:Simple push-fit installation without toolsDurable, food-grade materialFits 15 mm and 12 mm tubing systemsPerfect for water filters and reverse osmosis systemsReusable and easy to maintainReliable sealing for clean drinking waterThe CM series is not suitable for compressed air and vacuum applications.

The John Guest Straight Connector 15 mm (PM0415E) provides a clean and reliable solution for connecting water filters, reverse osmosis systems, and other drinking water setups. Its high-quality push-fit design ensures quick, tool-free installation that’s both leak-free and durable – ideal for DIY enthusiasts and professionals alike.Crafted from food-grade engineering plastic, this connector offers excellent resistance to pressure and temperature. Designed specifically for potable water use, it’s perfect for water filters, RO systems, aquarium setups, and various fluid applications where purity and safety matter.Whether used as a spare part or to expand an existing system, the John Guest connector delivers a strong, dependable connection between 15 mm tubing, ensuring your water filtration setup remains efficient, clean, and leak-free.Key Benefits:Quick and easy installation without toolsLeak-proof performance with precision fitSuitable for water filters, RO systems, and potable water applicationsMade from durable, food-grade plasticReusable and long-lastingFully compatible with all John Guest 15 mm fittingsThe connectors are also ideal for air, non-flammable gases (e.g. N2 and CO2) and vacuum applications.